Article
Chemistry, Multidisciplinary
Gabriele Baglioni, Makars Siskins, Maurits Houmes, Martin Lee, Dong Hoon Shin, Samuel Manas-Valero, Eugenio M. Coronado, Yaroslav Blanter, Herre S. J. G. van der Zant, Peter Steeneken
Summary: Magnetostrictive coupling has become a sensitive method for studying magnetism in 2D materials by mechanical means. In this study, we optothermally modulate the magnetization in antiferromagnetic 2D material membranes to induce a high-frequency magnetostrictive driving force. The thermo-magnetostrictive effect near the critical temperature of magnetostrictive 2D materials provides a route for more efficient actuation of nano-magnetomechanical devices and studying the coupling among magnetic, mechanical, and thermodynamic degrees of freedom.
Article
Chemistry, Physical
Sergii Burylov, Danil Petrov, Veronika Lackova, Katarina Zakutanska, Natalia Burylova, Alexey Voroshilov, Vyacheslav Skosar, Filippo Agresti, Peter Kopcansky, Natalia Tomasovicova
Summary: This paper presents complete theoretical and experimental studies on electrically and magnetically induced orientational transitions in suspensions of goethite nanorods in a nematic liquid crystal. Different types of samples with varied magnetic properties are prepared and observed. The magnetically induced transitions exhibit distinct orientational behaviors in the samples, with the compensated ferronematic requiring a higher magnetic field for the Freedericksz transition compared to pure nematic, and the magnetized ferronematic showing measurable response to magnetic fields even below the Freedericksz threshold.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Nanoscience & Nanotechnology
Shital Chauhan, Suman Kumari, P. K. Siwach, K. K. Maurya, Vivek Malik, H. K. Singh
Summary: The study found that superlattices formed through different annealing methods exhibited different electrical properties, with the phenomenon of reemergent transition temperatures attracting attention from researchers.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Physics, Condensed Matter
Mohd Alam, Dheeraj Kumar, Shiv Kumar, Masahiro Sawada, Kenya Shimada, Sandip Chatterjee
Summary: In this study, the electrical and magnetic properties of polycrystalline Eu2CoMnO6 are explored. The research covers thermally activated dielectric polarization, valence states of transition metals, coexistence of competing ferromagnetic and antiferromagnetic phases, large dielectric constant and frequency dispersion, and semiconducting nature.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Physics, Multidisciplinary
Kazuki Okigami, Ryota Yambe, Satoru Hayami
Summary: We propose a new stabilization mechanism for a skyrmion crystal (SkX) in a bilayer triangular lattice system. By analyzing the magnetic frustration between the ferromagnetic and antiferromagnetic layers, we find that a finite-Q spiral state and the SkX can be generated in the strong interlayer coupling regime. The degree of frustration is related to the interlayer exchange interaction, and stronger interlayer coupling leads to larger frustration effects and the stabilization of the SkX.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2022)
Article
Chemistry, Physical
T. Eto, X. Xu, T. Ito, F. Honda, D. X. Li, G. Oomi, F. Nakamura, H. Masumoto, R. Kainuma, T. Kanomata
Summary: This study experimentally investigated the phase transitions of Ni2+xMnGa1-x alloys and constructed experimental phase diagrams for these alloys. The results show that there are remarkable composition dependencies for characteristic temperatures, such as Curie temperature and martensitic transition temperature, with increasing x. The study also observed magnetostructural coupling in a specific composition range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Xiongbo Yang, Shumin Yao, Xinyu Tan, Yiteng Tu, Jialin Geng, Guiguang Qi, Yulong Qiao, Ruizhen Xu, Yanli Zhang
Summary: Passive daytime radiative cooling technology cools objects by reflecting sunlight and radiating heat into outer space, without requiring additional energy. A flexibly hierarchical porous PDMS radiative cooling film was fabricated, which has high emissivity and reflectance, resulting in a significant temperature drop.
Article
Chemistry, Physical
Brandon Wilfong, Vaibhav Sharma, Jared Naphy, Omar Bishop, Steven P. Bennett, Joseph Prestigiacomo, Radhika Barua, Michelle E. Jamer
Summary: The study investigated the effects of post-synthesis annealing temperature on Fe3Ga4 samples, revealing a trend in ISDW-FM transition temperature with changes in unit cell volume. External pressure and crystallographic changes were found to influence the transition temperatures, highlighting the importance of understanding the mechanism and nature of the intermediate ISDW phase for future device applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Environmental
Julio E. Sosa, Rui P. P. L. Ribeiro, Paulo J. Castro, Jose P. B. Mota, Ana B. Pereiro, Joao M. M. Araujo
Summary: The Kigali Amendment restricts the global use of F-gases and promotes the development of new refrigerants with lower global warming potential. This study investigates the potential of ionic liquids supported on silica as selective sorbents for F-gases, demonstrating the ability to finely tune selectivity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Maxim Mikhailenko, Salavat S. Khasanov, Alexader F. Shestakov, Aleksey Kuzmin, Akihiro Otsuka, Hideki Yamochi, Hiroshi Kitagawa, Dmitri Konarev
Summary: The synthesis of two new complexes through the reduction of metallic iron and their magnetic behaviors were studied. The results revealed that changes in the charge and spin state of the ligand can affect the spin arrangement of the iron ions.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Physics, Condensed Matter
Jeel Swami, Ambesh Dixit, Brajesh Tiwari
Summary: The magnetic ground state of the LaCrO3 and CaCrO3 solid solution, La1-xCaxCrO3 (@ 0 <= x <= 1), is investigated in this study to understand the magnetic phase transitions with Ca substitution. Using density functional theory with Hubbard correction, the system exhibits transitions from antiferromagnetic insulator (x = 0) to ferromagnetic half metal (x = 0.75) to antiferromagnetic metal (x = 1). The introduction of Hubbard energy U and Ca substitution affects the Cr-O hybridization, as observed in the partial density of states. The study presents a compositional phase diagram with the magnetic ground state for the La1-xCaxCrO3 (0 <= x <= 1) system.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Y. Hu, S. Jin, Z. F. Luo, H. H. Zeng, J. H. Wang, X. L. Fan
Summary: The study demonstrates that the Mn3Br8 monolayer, achieved through a designed defective structure, exhibits ferromagnetism with large MAE and maintains this property under small biaxial strain. Additionally, both biaxial strain and carrier doping can enhance the MAE, primarily contributed by the magneto-crystalline anisotropy energy (MCE).
NANOSCALE RESEARCH LETTERS
(2021)
Article
Crystallography
N. Liu, S. Schreyeck, K. M. Fijalkowski, M. Kamp, K. Brunner, C. Gould, L. W. Molenkamp
Summary: This study successfully grew high-quality MnBi2Te4 films with nearly perfect septuple-layer structure using molecular beam epitaxy on Si(1 1 1). The films exhibit antiferromagnetic order with a Neel temperature of 19 K, a spin-flop transition at a magnetic field of 2.5 T, and a resistivity of 1.6 mΩ·cm.
JOURNAL OF CRYSTAL GROWTH
(2022)
Article
Chemistry, Physical
Brandon Wilfong, Adrian Fedorko, Danil R. Baigutlin, Olga N. Miroshkina, Xiuquan Zhou, Gregory M. Stephen, Adam L. Friedman, Vaibhav Sharma, Omar Bishop, Radhika Barua, Steven P. Bennett, Duck Young Chung, Mercouri G. Kanatzidis, Vasiliy D. Buchelnikov, Vladimir V. Sokolovskiy, Bernardo Barbiellini, Arun Bansil, Don Heiman, Michelle E. Jamer
Summary: In this study, a complex magnetic phase diagram of metallic Fe3Ga4 at room temperature was obtained, and a model for the intermediate antiferromagnetic helical spin structure state was proposed. The results showed that the antiferromagnetic state had a helically ordered spiral propagating along the c-axis, with the magnetic moments rotating in the ab-plane. Under applied magnetic field, the antiferromagnetic state exhibited a transition to conical ordering, before entering a completely field-polarized ferromagnetic state.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Chemistry, Applied
Tatyana Lomova
Summary: The review provides an overview of the fundamental parameters and properties of metalloporphyrins/phthalocyanines with axial covalent M-O/M-N bonds, highlighting their potential applications in bioactive organic base detection, optoelectronics, and spintronics. The high oxidation state and heightened axial reactivity of these complexes compared to their two charged metal cation derivatives play a significant role in their function as molecular materials.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Mariano Andres Paulin, Gaston Garbarino, Ana Gabriela Leyva, Mohamed Mezouar, Joaquin Sacanell
Article
Chemistry, Physical
Lucia M. Toscani, Marina S. Bellora, Cristian Huck-Iriart, Analia L. Soldati, Joaquin Sacanell, Tereza S. Martins, Aldo F. Craievich, Marcia C. A. Fantini, Susana A. Larrondo, Diego G. Lamas
Summary: This study focuses on the analysis of SDC nanopowders and NiO/SDC nanocomposites in terms of their reducibility and catalytic activity for partial oxidation of methane. The results show that the crystallite size and surface area play a crucial role in methane activation by modifying the sample's redox behavior, with the oxidation of the metallic phase being the main cause of sample deactivation. A complex relationship between oxygen vacancy concentration and catalytic activity was observed during the experiments.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Materials Science, Multidisciplinary
A. A. Mendonca, L. Ghivelder, J. F. Jurado, A. M. Gomes
Summary: The research revealed that two Heusler compounds, Ni2Mn0.75Cu0.25Ga0.84Al0.16 and Ni2Mn0.70Cu0.30Ga0.84Al0.16, exhibit different magnetic properties and magnetocaloric effects during magnetic field changes. Ni2Mn0.75Cu0.25Ga0.84Al0.16 shows a significant magnetocaloric effect during the transition between magnetically aligned structures, while Ni2Mn0.70Cu0.30Ga0.84Al0.16 demonstrates high entropy change at room temperature.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Physics, Condensed Matter
M. Hsini, L. Ghivelder
Summary: The study demonstrates a discontinuous first order ferromagnetic-paramagnetic transition in La0.225Pr0.4(Ca1-xSrx)(0.375)MnO3 manganites with 0 <= x <= 0.10 at temperatures around 230-240 K, evolving to a continuous second order transition under high magnetic fields. Critical exponents were determined through magnetization analysis and found to not belong to any existing universality class, providing insights for predicting magnetic entropy change under high magnetic fields.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Materials Science, Ceramics
M. Quintero, B. Sievers, J. Sacanell
Summary: This study analyzes a method to control the effects induced by the thermal cycling effect (TCE) through high-temperature thermal treatments. The results reveal a complex interplay between the dynamic and static characteristics of the phase separated state.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
M. Hsini, L. Ghivelder, F. Parisi
Summary: The critical behavior of two manganite compounds was investigated using magnetization measurements and magnetocaloric calculations. It was found that scaling of the entropy change with magnetization is a powerful tool to study critical behavior. Modified Arrot Plot technique was used to determine the basic critical exponents for each sample, indicating that they are near to universality class models based in nearest neighbor interactions. The applicability of magnetocaloric analysis to determine critical behavior in complex magnetic systems was confirmed.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Ceramics
M. A. Paulin, G. Alejandro, D. G. Lamas, M. Quintero, R. O. Fuentes, J. E. Gayone, A. Butera, A. G. Leyva, J. Sacanell
Summary: The properties of nanostructured CeO2 powders with high purity were studied under different reducing atmospheres. The appearance of oxygen vacancies was found to promote a paramagnetic behavior in the initially diamagnetic oxide. This conclusion was inferred from the correlation between magnetic measurements and electronic properties analyzed by X-ray absorption experiments. Ex situ Electronic Paramagnetic Resonance (EPR) measurements at room temperature further confirmed the presence of paramagnetic behavior in all samples, with a direct correlation between the paramagnetic residual state and the creation of extrinsic oxygen vacancies.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Alberto A. Mendonca, Luis Ghivelder, Pablo L. Bernardo, Lesley F. Cohen, Angelo M. Gomes
Summary: In this study, a Cr-doped Ni2.15Mn0.70Cr0.15Ga alloy was investigated, which demonstrated a magnetostructural transition, thermal hysteresis, magnetocaloric effect, and ferromagnetic shape memory effect.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Davor L. Mariano, Dalber Ruben S. Candela, Daniele C. Freitas, AlgurioZ. Trujillo, Edson C. Passamani, Mucio A. Continentino, Luis Ghivelder
Summary: Below 42 K, the homometallic Co3O2BO3 ludwigite forms magnetic planes separated by nonmagnetic low-spin Co3+ ions. The substitution of Co3+ by other nonmagnetic ions enhances the magnetic interactions, raising the magnetic ordering temperature. However, depending on the nonmagnetic dopant ion, the remaining Co3+ ions could adopt a high-spin state, creating magnetic frustration and lowering the magnetic transition temperature. Doping Co3O2BO3 with nonmagnetic In3+ ions favors the appearance of both high-spin Co2+ and Co3+.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
C. W. Galdino, D. C. Freitas, C. P. C. Medrano, D. R. Sanchez, R. Tartaglia, L. P. Rabello, A. A. Mendonca, L. Ghivelder, M. A. Continentino, M. J. M. Zapata, C. B. Pinheiro, G. M. Azevedo, J. A. Rodriguez-Velamazan, G. Garbarino, M. Nunez-Regueiro, E. Granado
Summary: This study investigates the charge ordering phenomenon in a homometallic Co ludwigite, confirming the mixed-valent character of Co ions and observing smaller Co ions at the M4 site at low temperatures. As temperature increases, the size difference between Co ions at M4 and M2 sites decreases, indicating gradual charge redistribution within the structure. Structural disorder and broadened vibrational modes are observed at medium to high temperatures, along with consistent local Co-O distance distribution.
Article
Materials Science, Multidisciplinary
David Boldrin, Eduardo Mendive-Tapia, Jan Zemen, Julie B. Staunton, Angelo M. Gomes, Luis Ghivelder, John Halpin, Alexandra S. Gibbs, Araceli Aznar, Josep-Lluis Tamarit, Pol Lloveras, Xavier Moya, Lesley F. Cohen
Summary: The research found that the barocaloric properties of metallic antiperovskite Mn nitrides can be optimized for room-temperature application through quaternary alloying. It was discovered that quaternary Mn3Zn0.5In0.5N has a higher entropy change compared to ternary end members, and its pressure-driven barocaloric entropy change reaches a high value.
Article
Materials Science, Multidisciplinary
A. A. Mendonca, L. Ghivelder, P. L. Bernardo, Hanlin Gu, R. D. James, L. F. Cohen, A. M. Gomes
PHYSICAL REVIEW MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
S. Salem-Sugui, P. Lopes, M. P. Kern, Shyam Sundar, Zhaoyu Liu, Shiliang Li, Huiqian Luo, L. Ghivelder