Article
Chemistry, Multidisciplinary
Monica Bernal-Salamanca, Zorica Konstantinovic, Carlos Frontera, Victor Fuentes, Alberto Pomar, Lluis Balcells, Benjamin Martinez
Summary: This study analyzed the formation of nickel oxide nanocuboids on the surface of epitaxially grown double perovskite ferromagnetic thin films and found that annealing the films at high temperature under high oxygen partial pressure can enhance the spontaneous segregation of nanocuboids, resulting in a nanostructured film surface with locally different electrical transport characteristics.
Article
Chemistry, Physical
Monica Bernal-Salamanca, Lluis Balcells, Zorica Konstantinovic, Alberto Pomar, Benjamin Martinez, Carlos Frontera
Summary: Epitaxial thin films of high-quality PNMO double perovskite were successfully grown on SrTiO3 substrates by RF magnetron sputtering, and the influence of growth parameters on the film properties was investigated.
Article
Chemistry, Multidisciplinary
Monica Bernal-Salamanca, Javier Herrero-Martin, Zorica Konstantinovic, Lluis Balcells, Alberto Pomar, Benjamin Martinez, Carlos Frontera
Summary: This study systematically investigates the influence of film thickness on the structural and magnetic properties of PNMO double perovskite thin films. The results show a strong correlation between the film thickness and the structural and magnetic properties. The thinnest films exhibit a loss of ferromagnetism. Furthermore, through XAS and XMCD measurements and theoretical simulations, significant variations in the spin and orbital contributions to the magnetic moment are observed as the film thickness decreases.
Review
Physics, Applied
Xudong Liu, Jie Tu, Hangren Li, Jianjun Tian, Linxing Zhang
Summary: This paper introduces double perovskite ferroelectric thin films as a new material system with diverse composition and structure, providing new possibilities for the development of ferroelectric thin films. The ordered double perovskite ferroelectric thin films exhibit excellent ferroelectric, dielectric, magnetic, and optical properties, with potential applications in photovoltaic cells, information memory, and spintronic and photoelectric devices. However, complex internal physical mechanisms and difficult preparation conditions hinder its further development. This paper reviews the characterization methods and synthesis conditions affecting the ordering of double perovskite ferroelectrics, and presents the advances and challenges in various areas related to this material system.
APPLIED PHYSICS REVIEWS
(2023)
Article
Chemistry, Physical
Nagalingam Rajamanickam, Towhid H. Chowdhury, Shinji Isogami, Ashraful Islam
Summary: This study investigated the effects of Mn doping in methylammonium lead iodide, revealing a drastic enhancement in magnetic moment and the achievement of room-temperature ferromagnetism. The incorporation of Mn ions into the films resulted in structural and morphological changes, offering a potential pathway for spintronic and light-controlled magnetic devices.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Wonshik Kyung, Choong H. Kim, Yeong Kwan Kim, Beomyoung Kim, Chul Kim, Woobin Jung, Junyoung Kwon, Minsoo Kim, Aaron Bostwick, Jonathan D. Denlinger, Yoshiyuki Yoshida, Changyoung Kim
Summary: This study demonstrates that electric field can drive the rotation of octahedra in Sr2RuO4, and the surface electric field originates from the surface electric field, which can be tuned via the screening effect of the overlaid K layer. This work not only establishes that variation in the OR angle can be induced by an electric field, but also provides a way to control OR, which is an important step toward in situ control of the physical properties of perovskite oxides.
NPJ QUANTUM MATERIALS
(2021)
Article
Physics, Applied
Surbhi Ramawat, Sumit Kukreti, Abhijeet J. J. Kale, Rajeev Dutt, Aparna Chakrabarti, Ambesh Dixit
Summary: Cs2KMnCl6 is a stable 3d half-metal with high magnetic moment and ferromagnetic properties at high temperatures, as well as 100% spin polarization and high-speed conduction electrons, making it a promising candidate for spintronics.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Shanquan Chen, Jhong-Yi Chang, Qinghua Zhang, Qiuyue Li, Ting Lin, Fanqi Meng, Haoliang Huang, Yangyang Si, Shengwei Zeng, Xinmao Yin, My Ngoc Duong, Yalin Lu, Lang Chen, Er-Jia Guo, Hanghui Chen, Chun-Fu Chang, Chang-Yang Kuo, Zuhuang Chen
Summary: The spin state of Co ions in epitaxial LaCoO3 thin films under tensile strain has been determined to have mixed high-spin and low-spin states, while it is practically a low-spin state under compressive strain. The identification of this spin state ratio explains the origin of ferromagnetism in LaCoO3 films. This study highlights the importance of spin state degrees of freedom and thin-film strain engineering in creating new physical properties that do not exist in bulk materials.
Article
Chemistry, Physical
Mythili Surendran, Huandong Chen, Boyang Zhao, Arashdeep S. Thind, Shantanu Singh, Thomas Orvis, Huan Zhao, Jae-Kyung Han, Han Htoon, Megumi Kawasaki, Rohan Mishra, Jayakanth Ravichandran
Summary: This study reports the direct epitaxial thin film growth of chalcogenide perovskite BaZrS3 by pulsed laser deposition, showing smooth film surfaces and strong potential for photovoltaic applications. The films exhibit clear epitaxial relationship with the substrate, and photodetector devices demonstrate fast and efficient photo response, making BaZrS3 a promising candidate for ultrathin front absorbers in tandem solar cells.
CHEMISTRY OF MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Satoru Hayami
Summary: In this study, a topologically nontrivial double-Q state with a net spin scalar chirality on a two-dimensional square lattice is investigated. Unconventional noncoplanar spin textures distinct from skyrmion crystal are obtained by the double-Q spiral superposition of ordering wave vectors located at the Brillouin zone boundary. The stability of this double-Q state is achieved through the interplay among the easy-axis anisotropic interaction, high-harmonic wave-vector interaction, and external magnetic field. When the Fermi level is located in the band gaps, the double-Q state becomes a Chern insulating state with a quantum Hall conductivity. This study provides a new platform for realizing topological magnetic states other than skyrmion crystals by focusing on the symmetry of constituent ordering wave vectors in momentum space.
Article
Chemistry, Multidisciplinary
Xianwu Tang, Ling Hu, Xiaoguang Zhu, Xuebin Zhu, Yongjin Wang, Yuping Sun
Summary: Rare-earth nickelates-based high-entropy oxide thin films were successfully deposited on different oriented LaAlO3 substrates via chemical solution deposition. The films exhibited epitaxial grain growth and a first-order metal-to-insulator transition. Particularly, the (110)-oriented films showed a well-defined transition temperature and high sharpness.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Paresh C. Rout, Udo Schwingenschlogl
Summary: By using density functional theory and Monte Carlo simulations, we found that epitaxial strain can enhance the critical temperature of double perovskite Sr2FeOsO6, enabling room-temperature applications. Under tensile strain, the material undergoes structural and magnetic transitions, accompanied by an indirect-to-direct band gap transition, which leads to efficient electron-hole separation upon photoexcitation.
Article
Chemistry, Physical
Xinjiang Wang, Jingxiu Yang, Xueting Wang, Muhammad Faizan, Hongshuai Zou, Kun Zhou, Bangyu Xing, Yuhao Fu, Lijun Zhang
Summary: In this study, a variety of multielement double-perovskite alloys were theoretically investigated. It was found that the entropy contribution can significantly enhance the material stability of the alloys, while also allowing for tuning of bandgaps and carrier effective masses. In addition, the optical transition intensity could be enhanced due to the lower symmetry of configurational disorder. This work demonstrates a promising strategy of utilizing the alloy entropic effect to improve the stability and optoelectronic performance of halide perovskites.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Review
Nanoscience & Nanotechnology
Mingyue Tian, Lan Xu, Ya Yang
Summary: Perovskite oxide thin film materials are widely used in various fields of human life due to their excellent physical properties, providing more convenience. The performance of thin films is influenced by multiple factors, and the application area of thin films is determined by the preparation, structure, and performance of the material.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Multidisciplinary Sciences
Changshun Chen, Jianxin Chen, Huchen Han, Lingfeng Chao, Jianfei Hu, Tingting Niu, He Dong, Songwang Yang, Yingdong Xia, Yonghua Chen, Wei Huang
Summary: Researchers have developed a new screen-printing method for fabricating perovskite solar cells, achieving high energy conversion efficiencies. This method is not affected by humidity, and the fabrication process is simple and suitable for large-scale production.
Article
Materials Science, Multidisciplinary
Natalia Rinaldi-Montes, Pedro Gorria, Antonio B. Fuertes, David Martinez-Blanco, Zakariae Amghouz, Ines Puente-Orench, Luca Olivi, Javier Herrero-Martin, Maria Paz Fernandez-Garcia, Javier Alonso, Manh-Huong Phan, Hariharan Srikanth, Xavi Marti, Jesus A. Blanco
Summary: The surface symmetry breaking of Cr2O3 nanoparticles leads to a weak ferromagnetic signal that persists up to near room temperature. Additionally, the exchange-bias effect observed at low temperatures up to 30K exhibits resistance to thermal disorder.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Xiaodong Zhang, Arnau Romaguera, Felip Sandiumenge, Oscar Fabelo, Javier Blasco, Javier Herrero-Martin, Jose Luis Garcia-Munoz
Summary: The layered perovskite YBaCuFeO5 (YBCFO) exhibits chiral magnetic order at unexpectedly high temperatures, which could lead to strong magnetoelectric coupling at room temperature. The A-site cations in this perovskite are fully ordered, while the occupancy of the B-sites depends on the preparation process. By partially substituting the highly symmetric Fe3+ ions with Jahn-Teller active Mn3+ ions, the spin-orbit coupling in the system can be increased. A highly ordered single crystal of YBaCuFe0.95Mn0.05O5 has been synthesized and studied, showing different structural and magnetic properties compared to a more disordered polycrystalline specimen. The magnetic phases and transitions in the single crystal grown by the traveling solvent floating zone (TSFZ) method are fully described and analyzed in relation to its high level of Fe/Cu cationic order (~90%).
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Gabriele De Luca, Jonathan Spring, Moloud Kaviani, Simon Johr, Marco Campanini, Anna Zakharova, Charles Guillemard, Javier Herrero-Martin, Rolf Erni, Cinthia Piamonteze, Marta D. Rossell, Ulrich Aschauer, Marta Gibert
Summary: By designing an intermediate layer on the interface, remote control of charge transfer and restoration of the magnetic properties of films can be achieved. The study focused on the grown model of La2NiMnO6 (LNMO) thin films on perovskite oxide substrates and found that the introduction of an intermediate layer can redistribute the electron excess and restore the ferromagnetic properties of the ultrathin LNMO films.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Ryuji Fujita, Jieyi Liu, Xiaofei Hou, Yanfeng Guo, Javier Herrero-Martin, Gerrit van der Laan, Thorsten Hesjedal
Summary: This study demonstrates the usefulness of X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) for the study of magnetic order in few- and monolayer van der Waals materials. The techniques provide thickness-resolved spectroscopic and magnetic properties, revealing the variations in spin and orbital magnetic moments with film thickness. The research highlights the interplay between electron correlation and ferromagnetism in the ferromagnetic semiconductor CrSiTe3.
Article
Chemistry, Multidisciplinary
Ashley P. P. Black, Andrea Sorrentino, Francois Fauth, Ibraheem Yousef, Laura Simonelli, Carlos Frontera, Alexandre Ponrouch, Dino Tonti, M. Rosa Palacin
Summary: Synchrotron radiation based techniques are powerful tools for battery research, providing insight into length scales, depth sensitivities, and spatial/temporal resolutions. Operando experiments enable characterization during battery operation and help elucidate reaction mechanisms. This article discusses the state of the art for relevant techniques (scattering, spectroscopy, and imaging) and addresses bottlenecks specific to battery applications, including cell design improvement, multi-modal characterization, and automated data analysis protocols. Accelerated progress is expected in these areas, fostering advancements in battery performance.
Article
Materials Science, Multidisciplinary
Miguel Gavara-Edo, Francisco Javier Valverde-Munoz, Rosa Cordoba, M. Carmen Munoz, Javier Herrero-Martin, Jose Antonio Real, Eugenio Coronado
Summary: In this study, three new neutral Fe(II) SCO molecules belonging to the {Fe[H2B(pz)(2)](2)(L)} family were synthesized, and their crystallographic structure and magnetic properties were investigated. These compounds exhibited thermal- and light-induced SCO transitions with different degrees of cooperativity and effectiveness. Furthermore, two of the compounds were demonstrated to be sublimable, forming homogeneous thin films that retained the chemical integrity of the original molecules. SCO/2D horizontal hybrid devices based on CVD-graphene were successfully produced using these films, enabling the detection of the thermal SCO transition through the electric properties of CVD-graphene.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Jose Santiso, Carlos Garcia, Cristian Romanque, Loic Henry, Nicolas Bernier, Nuria Bagues, Jose Manuel Caicedo, Manuel Valvidares, Felip Sandiumenge
Summary: Yttrium iron garnet is a promising material for various applications, but its epitaxial films in the nanometer thickness range show significant variations in magnetic behavior, limiting their potential use in technological devices. In this study, the atomic structure of a nominally stoichiometric thin film was directly visualized and analyzed, revealing the presence of Y-excess octahedral antisite defects. The low occurrence of scattering centers and the suppression of magnetic moment by the defects were observed, providing insights into the magnetic properties of the thin film.
Article
Nanoscience & Nanotechnology
Sergi Martin-Rio, Zorica Konstantinovic, Alberto Pomar, Lluis Balcells, Javier Pablo-Navarro, M. Ricardo Ibarra, Cesar Magen, Narcis Mestres, Carlos Frontera, Benjamin Martinez
Summary: Spin injection and spin-charge conversion processes were studied in all-oxide La(2/3)Sr(1/3)MnO(3)/SrIrO3 (LSMO/SIO) heterostructures with different SIO layer thickness and interfacial features. Spin pumping was used to generate pure spin currents in FM LSMO, and successful spin injection into the SIO layers was observed. However, the spin mixing conductance was lower compared to traditional Py/Pt or YIG/Pt systems. Interfaces were found to be structurally clean but with interdiffusion of atomic species near the interface. The low transversal ISHE voltage signals suggested the importance of interfacial features in controlling the spin injection process.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Victor Garcia-Lopez, Niccolo Giaconi, Lorenzo Poggini, Joaquin Calbo, Amelie Juhin, Brunetto Cortigiani, Javier Herrero-Martin, Enrique Orti, Matteo Mannini, Miguel Clemente-Leon, Eugenio Coronado
Summary: The synthesis and characterization of a new Co(II) spin-crossover (SCO) complex based on a 4'-(4-carboxyphenyl)-2,2':6',2''-terpyridine ligand are described. The complex can be successfully grafted on the surface of silver while maintaining the spin-crossover behavior. Various techniques including AFM, MALDI-TOF MS, Raman spectroscopy, and XPS measurements confirmed the formation of a monolayer of intact molecules grafted onto the Ag surface through carboxylate groups. Raman spectroscopy, XPS, and XAS supported by first-principles calculations demonstrated a gradual spin transition of the deposited molecules with temperature, which is unprecedented for a monolayer of molecules directly grafted onto a metallic surface.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Rafael Trocoli, Raphaelle Houdeville, Carlos Frontera, Smobin Vincent, Juan Maria Garcia Lastra, M. Rosa Palacin
Summary: The redox behavior of potassium manganese hexacianoferrate in magnesium electrolytes has been studied and it was found that ion deintercalation during oxidation and contamination from the membrane can interfere with the electrochemical response. In the absence of alkaline ions, pre-oxidized manganese hexacianoferrate can reversibly intercalate magnesium, but the specific intercalation position cannot be determined with the available experimental data.
Article
Chemistry, Inorganic & Nuclear
Jhonatan R. Guarin, Carlos Frontera, Judith Oro-Sole, Jaume Gazquez, Clemens Ritter, Josep Fontcuberta, Amparo Fuertes
Summary: Europium tantalum perovskite oxynitrides were successfully prepared by a new high-temperature solid-state synthesis method. The crystal structure and magnetic properties of the materials can be tuned by different reactant mixtures and gas atmospheres. Among them, Eu3Ta3O3.66N5.34 is the first example of a triple perovskite oxynitride.
INORGANIC CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Zheng Ma, Laura Fuentes-Rodriguez, Zhengwei Tan, Eva Pellicer, Llibertat Abad, Javier Herrero-Martin, Enric Menendez, Nieves Casan-Pastor, Jordi Sort
Summary: Magneto-ionics is a unique approach to control magnetism with electric field. This study demonstrates wireless control of magnetism through induced polarization in conducting materials, providing a new pathway for voltage-driven magnetism control. The results have potential applications in various fields such as bioelectronics, catalysis, neuromorphic computing, and wireless communications.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Ignasi Burgues-Ceballos, Paula Pinyol-Castillo, Aina Lopez-Porta, Enric Pascual, Tomas Syrovy, Lucie Syrova, Frantisek Josefik, Benjamin Dhuiege, Irene Serrano, Paul D. Lacharmoise, Laura Lopez-Mir
Summary: This study demonstrates the large-scale fabrication of organic photovoltaic modules embedded into structural plastic parts through industrial injection molding for the first time. The modules injected with thermoplastic polyurethane exhibit enhanced mechanical stability while maintaining high flexibility, with minimal efficiency losses and a remarkable process yield close to 90%.
Article
Nanoscience & Nanotechnology
Laura Garcia-Quintana, Nagore Ortiz-Vitoriano, Haijin Zhu, Gene M. Nolis, Javier Herrero-Martin, Maria Echeverria, Juan Miguel Lopez del Amo, Maria Forsyth, Alan M. Bond, Patrick C. Howlett, Cristina Pozo-Gonzalo
Summary: Hybrid electrolytes composed of diglyme and ionic liquids were investigated for Na-O-2 batteries to control the growth and purity of discharge products. The chemical composition of ILs significantly affects the morphology and composition of discharge products, with the electrolyte properties and Na+ speciation playing crucial roles. The use of pyrrolidinium IL with a linear alkyl chain resulted in smaller discharge particle sizes and higher Coulombic efficiency in long-term cycling of Na-O-2 batteries.
ACS APPLIED MATERIALS & INTERFACES
(2022)
