Article
Chemistry, Physical
Yu-Hsu Chang, Haicheng Wang, Ting-Fong Siao, Yuan-Han Lee, Shi-Yun Bai, Ching-Wen Liao, Jie-Kai Zhuang, Te-Wei Chiu, Chun-Hong Kuo
Summary: In this study, CuFeO2 and Mg-doped CuFeO2 powders were synthesized using a novel chemical solution route, and their structural and optical properties, as well as their applications in photodegradation and electrocatalytic reactions, were analyzed. The Mg-doped CuFeO2 powder showed higher carrier concentration and better photodegradation efficiency compared to CuFeO2 powder, attributed to its characteristics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Shui-Miao Yu, Zong-Yan Zhao
Summary: Using density functional theory calculations, we systematically investigated the doping effects of various dopants at different lattice positions in CuFeO2-based photocatalysts. Our findings showed that Mn replacing Fe and N replacing O were the most readily achievable doping methods under different oxygen conditions. We also discovered that different dopants can generate impurity levels capable of capturing photogenerated charges and promote the separation of photogenerated electron-hole pairs.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
N. Ziani, E. Aubry, N. Martin, L. Hirsinger, A. Billard, P. Briois, M. S. Belkaid, M. Arab Pour Yazdi
Summary: Delafossite CuFeO2 films were synthesized by reactive magnetron sputtering at different substrate temperatures ranging from 380 to 550 degrees C. The films exhibited a rhombohedral structure and showed partial dissociation of the delafossite phase into FCC Cu and Fe3O4 magnetite phases at the highest temperature, as well as changes in preferential orientation and optical properties with temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Rui-Ping Li, Bao-Feng Shan, Zong-Yan Zhao
Summary: A series of CuFeO2 hexagonal nanosheets with different grain size were prepared by adjusting the synthesis conditions. The samples all showed a pure 3R-Delafossite phase, the same composition, the same optical absorption features, and the same hexagonal sheet morphology. However, the width and thickness of these nanosheets varied.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Rui-Ping Li, Shui-Miao Yu, Zong-Yan Zhao
Summary: This study aims to enhance the photoelectrochemical (PEC) properties of CuFeO2 nanosheets by constructing closely bonded CuFeO2/ CuO heterostructures. Through an optimized fabrication process, the CuFeO2@VO-CuO core-shell architecture showed significantly improved PEC performance, with higher photocurrent density and overall efficiency. The solid atomic-level contact bonding at the CuFeO2@VO-CuO junction and the presence of oxygen vacancies play important roles in achieving efficient separation and transfer of photogenerated electron-hole pairs.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Jianyang Li, Jingqi Tian, Mengting Lu, Chenyu Yang, Huaiguo Xue, Tengfei Jiang
Summary: In this study, a 2D on 2D CuFeO2/Co-LDH heterojunction was prepared, which exhibited enhanced charge separation efficiency due to the interfacial built-in electric field. The optimized CuFeO2/Co-LDH-3 heterojunction showed the highest photocurrent and achieved optimal performance in the photocatalytic selective oxidation of benzyl alcohol.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Fatemah H. Alkallas, Amira Ben Gouider Trabelsi, Tahani A. Alrebdi, Ashour M. Ahmed, Mohamed Rabia
Summary: An optoelectronic device synthesized from a CuFeO2/CuO/Cu nanocomposite obtained through direct combustion of Cu foil coated with Fe2O3 nanomaterials was examined for its chemical, morphological, and optical properties. The nanocomposite showed enhanced optical properties compared to CuO nanomaterials, as evidenced by smaller bandgap values. The device exhibited high light sensitivity and efficiency in a broad optical region, covering UV, Vis, and near IR.
Article
Materials Science, Multidisciplinary
Lingbo Mao, Swati Mohan, Santosh K. Gupta, Yuanbing Mao
Summary: The study developed CuFeO2 particles demonstrating multifunctional applications through hydrothermal and sol-gel methods, showing excellent catalytic performance. The HCF sample exhibited higher current density and lower overpotential, functioning as a bifunctional catalyst for hydrogen and oxygen evolution reactions, with potential for sensing Rhodamine B.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Manabu Hagiwara, Masahiko Tato, Daishi Shiojiri, Tsutomu Iida, Shinobu Fujihara
Summary: The combined effect of chemical doping and grain orientation on the thermoelectric properties of CuFeO2 ceramics was investigated. Ni doping was found to effectively enhance the electrical conductivity and reduce the thermal conductivity while maintaining a high Seebeck coefficient. CuFeO2 ceramics with a preferred c-axis orientation and doped with 1 and 3 mol% Ni exhibited an improved dimensionless figure of merit.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Benedikt Klobes, Manuel Angst, Daniela Fenske, Chinmay M. Konnur, Abdelfattah Mahmoud, Moulay Tahar Sougrati
Summary: The magnetic properties and hyperfine interactions of the 2H polymorph of delafossite CuFeO2 were studied using SQUID magnetometry and Mossbauer spectroscopy at low temperatures. An impurity of a-Fe2O3 was detected in the hydrothermally synthesized 2H-CuFeO2 sample, and its contribution to the magnetic properties and hyperfine interactions could be distinguished from the main 2H-CuFeO2 phase. The morphology and optical band gap measurements showed expected results for a hydrothermally synthesized delafossite sample. The magnetic susceptibility of 2H-CuFeO2 exhibited antiferromagnetic transitions at 16 K and 13.5 K or 10 K, indicating modified exchange interactions compared to the 3R polymorph. Mossbauer measurements revealed complex spectral shapes at low temperatures and magnetic relaxations above 20 K.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
A. Maouhoubi, L. Ouzaroual, Y. Toual, S. Mouchou, F. Mezzat, A. Azouaoui, H. Ez-Zahraouy, A. Hourmatallah, K. Bouslykhane, N. Benzakour
Summary: The structural, electronic and magnetic properties of CuFeO2 were studied using DFT and MCS. The material was found to be antiferromagnetic and showed metallic behavior in PBE-GGA and semiconductor behavior in TB-mBJ, nmBJ and GGA+U approximations. The MCS results revealed two phase transitions and provided the Neel temperatures.
ARABIAN JOURNAL OF CHEMISTRY
(2024)
Article
Engineering, Electrical & Electronic
Hong-Shun Zheng, Guo-Ying Yao, Zong-Yan Zhao
Summary: In this study, the microstructures and electronic structures of CuFeO2 surfaces were analyzed using density functional theory calculations. It was found that the presence of surface states due to dangling bonds on the outermost surfaces has an impact on the separation and recombination of photogenerated electron-hole pairs. The relaxed (001) surface was found to be the most stable and dominating exposed crystal facet among all considered surfaces.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Haiwan Xu, Rui Wu, Jia-Ye Zhang, Wenqiao Han, Lang Chen, Xuan Liang, Choon Y. Haw, Piero Mazzolini, Oliver Bierwagen, Dong-Chen Qi, Kelvin H. L. Zhang
Summary: In this study, the electronic structure of CuFeO2 was directly investigated using resonant photoemission spectroscopy and X-ray absorption spectroscopy. It was found that CuFeO2 has an indirect and d-d forbidden band gap of 1.5 eV, and the localized nature of Fe 3d states at the edges of the valence and conduction bands limits carrier mobility.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
D. Prasad, G. Anitha, L. Megalan Leo, Atul Kumar
Summary: Despite advancements in PV physics, PV has not surpassed conventional energy due to cost, toxicity, and stability concerns. This study focuses on CuFeO2 as a potential low-cost, high-efficiency solar cell material, with theoretical modeling and analysis indicating its promising photovoltaic performance.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Review
Physics, Multidisciplinary
Javier Junquera, Yousra Nahas, Sergei Prokhorenko, Laurent Bellaiche, Jorge iniguez, Darrell G. Schlom, Long-Qing Chen, Sayeef Salahuddin, David A. Muller, Lane W. Martin, R. Ramesh
Summary: The past decade has witnessed significant progress in understanding emergent topological polar textures in oxide nanostructures, including vortices, skyrmions, merons, hopfions, dipolar waves, and labyrinthine domains. The discovery of low-dimensional ferroelectric oxide nanostructures has altered the perceived energy cost associated with the formation of these structures, allowing for manipulation of order parameters. This review provides a historical context, scientific description, and discussion of the potential applications and future challenges in this field.
REVIEWS OF MODERN PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Hiroaki Mamiya, Noriki Terada, Masashi Hase, Naohito Tsujii, Hideaki Kitazawa
Summary: The effects of Sc substitution on metamagnetic transitions for erbium were investigated in order to find optimal magnetocaloric materials for high-efficient magnetic refrigeration. It was observed that the Neel temperature decreased with increasing Sc substitution. The metamagnetic transitions from antiferromagnetic-like to ferromagnetic-like configurations were accompanied by relatively large magnetic entropy changes for all samples. These findings are important for further studies on magnetic refrigeration utilizing the features of metamagnetic transitions.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Chemistry, Multidisciplinary
Andrei N. Salak, Vladimir V. Shvartsman, Joao Pedro Cardoso, Anatoli Pushkarev, Yury Radyush, Nikolai M. Olekhnovich, Dmitry D. Khalyavin, Joaquim M. Vieira, Erik Cizmar, Alexander Feher
Summary: (1-x)BiMg0.5Ti0.5O3-xBiZn0.5Ti0.5O3 [(1- x)BMT-xBZT] ceramics, lead-free structural analogs of PbZrO3 and PbTiO3, were synthesized under high pressure. The compositions with <75 mol% BZT content were found to be orthorhombic, while those with a higher BZT content were tetragonal, and a morphotropic phase boundary appeared at x=0.75. Piezoresponse force microscopy measurements confirmed the ferroelectric state of the materials and allowed for estimation of their intrinsic piezoelectric coefficients.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Physical
T. Arh, B. Sana, M. Pregelj, P. Khuntia, Z. Jaglicic, M. D. Le, P. K. Biswas, P. Manuel, L. Mangin-Thro, A. Ozarowski, A. Zorko
Summary: Evidence for a quantum spin liquid phase in NdTa7O19 is reported, with effective spin-1/2 degrees of freedom and Ising-like nearest-neighbour correlations stabilized by strong spin-orbit coupling, allowing spin excitations to persist at low temperatures.
Article
Materials Science, Multidisciplinary
Jiawei Lai, A. Bolyachkin, N. Terada, S. Dieb, Xin Tang, T. Ohkubo, H. Sepehri-Amin, K. Hono
Summary: Fe2P-type compounds exhibit a giant magnetocaloric effect and are studied for room temperature applications. In this study, rare-earth-free compounds with cryogenic magnetocaloric effect were optimized using data mining and machine learning, demonstrating promising magnetocaloric performance.
Article
Chemistry, Inorganic & Nuclear
Alexei A. Belik, Ran Liu, Lei Zhang, Noriki Terada, Masahiko Tanaka, Kazunari Yamaura
Summary: An A-site-ordered quadruple perovskite NdMn7O12 was synthesized at high pressure and high temperature, and its crystal structure and magnetic properties were investigated. The study revealed structural and magnetic phase transitions at different temperatures, as well as complex frequency-dependent features.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Physics, Multidisciplinary
Ryan Stadel, Dmitry D. Khalyavin, Pascal Manuel, Koji Yokoyama, Saul Lapidus, Morten H. Christensen, Rafael M. Fernandes, Daniel Phelan, Duck Young Chung, Raymond Osborn, Stephan Rosenkranz, Omar Chmaissem
Summary: The study of iron-pnictide superconductors is important for understanding unconventional high-temperature superconductivity. By using neutron diffraction, researchers have observed three competing magnetic orders in LaFeAs1-xPxO and found that the reduction in electronic correlations leads to larger Fermi surfaces and sequential stabilization of multiple magnetic anisotropies.
COMMUNICATIONS PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Alexei A. Belik, Dmitry D. Khalyavin, Yoshitaka Matsushita, Kazunari Yamaura
Summary: A new member of A-site columnar-ordered A(2)A'A'' B4O12 quadruple perovskites Y2CuGaMn4O12 prepared by a high-pressure, high-temperature method exhibits long-range ferrimagnetic order and anisotropic thermal expansion. The Cu2+ doping significantly changes the magnetic properties, affecting the ordering.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
A. N. Salak, J. P. Cardoso, D. D. Khalyavin, A. Barbier, P. Fertey, S. M. Mikhalev, N. M. Olekhnovich, A. V. Pushkarev, Yu V. Radyush, A. Stanulis, R. Ramanauskas
Summary: Crystal structures and temperature/pressure behaviors of high-pressure synthesized perovskite phases in the (1-x)BiFe0.5Sc0.5O3-xLaFe0.5Sc0.5O3 (0 ≤ x ≤ 1) system were studied. Antipolar Pnma structure with V2ap x 4ap x 2V2ap superstructure was observed for x ≤ 0.05, while incommensurately modulated Imma(00 gamma)s00 structure was found for 0.10 ≤ x ≤ 0.33. Non-polar Pnma phase was stable for x ≥ 0.34. The transformation between these phases was reversible with temperature and pressure.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Physics, Multidisciplinary
J. N. Graham, N. Qureshi, C. Ritter, P. Manuel, A. R. Wildes, L. Clark
Summary: Controlling spiral spin liquids is crucial for realizing this novel magnetic ground state and understanding its robustness against perturbations that arise in real materials. This study demonstrates that LiYbO2 is the first experimental realization of a spiral spin liquid and provides evidence through neutron scattering studies. The reconstructed scattering maps reveal continuous spiral spin contours, a characteristic experimental hallmark of this exotic magnetic phase.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
C. D. Dashwood, A. H. Walker, M. P. Kwasigroch, L. S. I. Veiga, Q. Faure, J. G. Vale, D. G. Porter, P. Manuel, D. D. Khalyavin, F. Orlandi, C. V. Colin, O. Fabelo, F. Krueger, R. S. Perry, R. D. Johnson, A. G. Green, D. F. McMorrow
Summary: The transition in the layered-ruthenate material Ca3Ru2O7 is driven by a lattice strain that tunes the electronic bandwidth. External strain can stimulate the development of internal strain, lowering the electronic energy. These findings are important for understanding the driving force behind coupled phase transitions and controlling them.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Dylan Behr, Davide Delmonte, Edmondo Gilioli, Dmitry D. Khalyavin, Roger D. Johnson
Summary: This study confirms the unique spin reorientation transition and weak ferromagnetism in BiCrO3, making significant contributions to understanding the mechanisms involved.
Article
Materials Science, Multidisciplinary
Noriki Terada, Tomohito Nakano, Claire Colin, Anne Stunault, Navid Qureshi, Bachir Ouladdiaf, Hirohiko Sato
Summary: The ferroelectricity and magnetic ordering of multiferroic orthorhombic perovskite YMnO3 were studied, revealing the ferroelectric polarization, magnetic structure, and collinear E-type ordering in the low-temperature ferroelectric phase. Experimental results indicated a single collinear E-type structure with small incommensurability as the magnetic ground state of YMnO3.
Article
Materials Science, Multidisciplinary
Andrea Amorese, Dmitry Khalyavin, Kurt Kummer, Nicholas B. Brookes, Clemens Ritter, Oksana Zaharko, Camilla Buhl Larsen, Orest Pavlosiuk, Adam P. Pikul, Dariusz Kaczorowski, Matthias Gutmann, Andrew T. Boothroyd, Andrea Severing, Devashibhai T. Adroja
Summary: CeRh3Si2 exhibits unique magnetic properties, and neutron and x-ray scattering studies provide insights into its magnetic structure and crystal-field excitations.
Article
Materials Science, Multidisciplinary
Pavitra N. Shanbhag, Anjana Joseph, Fabio Orlandi, Pascal Manuel, R. Mahendiran, Francois Fauth, Chandrabhas Narayana, A. Sundaresan, C. N. R. Rao
Summary: A comprehensive study on gallium-doped polycrystalline V2O3 reveals interesting features of the structural, magnetic, and electronic phase transitions, including the enhancement of the Néel temperature by gallium doping and the decoupling of the structural transition from the magnetic and insulator-insulator transition.
Article
Materials Science, Multidisciplinary
S. W. Lovesey, D. D. Khalyavin, G. van der Laan
Summary: This study examines the magnetic structure of rutile-type RuO2 and analyzes it using methods such as X-ray diffraction and polarized neutron study. The results indicate that the magnetic properties of rutile-type RuO2 can be described by a simple antiferromagnetic structure.