Article
Chemistry, Inorganic & Nuclear
Run-Guo Wang, Yin-Shan Meng, Fang-Fang Gao, Wan-Qing Gao, Chun-Hua Liu, Anyang Li, Tao Liu, Yuan-Yuan Zhu
Summary: Understanding the correlation between spin-state behavior and structural features in transition-metal complexes is crucial for designing high-performance spin crossover compounds. This study investigates the influence of ligand symmetry on spin crossover properties through three mononuclear Fe(ii) isomers. The results indicate that greater steric congestion leads to larger coordination distortion, favoring the electron configuration in the high-spin state.
DALTON TRANSACTIONS
(2021)
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
Physics, Applied
Chaowei Hu, Makariy A. Tanatar, Ruslan Prozorov, Ni Ni
Summary: MBT is the first intrinsic magnetic topological insulator and can be made ferromagnetic through specific methods. We studied the magnetic dynamics of several ferromagnetic MBT compounds and found a universal slow relaxation behavior, attributing it to irreversible domain movements. The soft nature of ferromagnetic domains was revealed by our magneto-optical measurements.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Ceramics
Shannon E. Murray, Yu-Ying Lin, Soumitra S. Sulekar, Mebatsion S. Gebre, Nicola H. Perry, Daniel P. Shoemaker
Summary: Reactive flash sintering is an effective method for densifying and synthesizing ceramic materials, but the predictive capability of the BBR model for phase transformations during the process is limited. CuO reduction and Mn(2)O(3) reduction demonstrate the challenges of predicting phase transformations due to local, stochastic current flow and localized heating. Understanding and engineering the complex thermal profile that results from these sources of inhomogeneity can be beneficial for optimizing reaction kinetics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Physics, Multidisciplinary
Yukihiro Watanabe, Masashi Kumazaki, Hiroki Ezure, Takao Sasagawa, Robert Cava, Masayuki Itoh, Yasuhiro Shimizu
Summary: Dirac fermions in semiconducting bismuth alloys exhibit strong magnetic responses, including interband diamagnetism and enhanced intraband diamagnetism, with the nuclear spin-lattice relaxation rate mainly controlled by orbital excitation. These findings highlight the robust diamagnetism and low-lying orbital excitation of Dirac fermions against a small gap opening.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2021)
Article
Chemistry, Physical
Ping Li, Xue-Song Zhou, Zhi-Xin Guo
Summary: This study proposes a method to efficiently control 2D magnets with a small electric field in a multiferroic heterostructure. The feasibility of this strategy is demonstrated in the bilayer CrI3/BiFeO3(001) heterostructure using first-principles calculations. The heterostructure exhibits strong magnetoelectric coupling, allowing efficient switching between ferromagnetic and antiferromagnetic states of the bilayer CrI3 by the polarized states of BiFeO3(001).
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chi Xuan Trang, Qile Li, Yuefeng Yin, Jinwoong Hwang, Golrokh Akhgar, Iolanda Di Bernardo, Antonija Grubisic-Cabo, Anton Tadich, Michael S. Fuhrer, Sung-Kwan Mo, Nikhil Medhekar, Mark T. Edmonds
Summary: This study used temperature-dependent angle-resolved photoemission spectroscopy to investigate ultrathin MnBi2Te4, revealing a temperature-dependent magnetic topological phase transition that can be achieved at higher temperatures.
Article
Materials Science, Multidisciplinary
Javier Feijoo, Anibal Iucci, Alejandro M. Lobos
Summary: We theoretically study the spectral properties of a one-dimensional semiconductor-superconductor-ferromagnetic insulator (SE-SU-FMI) hybrid nanostructure. The hybrid structure is modeled as a one-dimensional single-channel semiconductor nanowire under the simultaneous effect of superconducting pairing and a (spatially inhomogeneous) Zeeman exchange field. We find a rich quantum phase diagram and a complex subgap Andreev bound state (ABS) spectrum.
Article
Materials Science, Multidisciplinary
Ryoma Kaneko, Kentaro Ueda, Shiro Sakai, Yusuke Nomura, Marie-Therese Huebsch, Ryotaro Arita, Yoshinori Tokura
Summary: Carrier doping is essential for generating highly correlated metals with emergent properties in Mott insulators. The study investigated the effect of carrier doping on electronic phase transitions in (Pr1-xCax)(2)Ru2O7, revealing an insulator-metal transition with increasing hole doping x and the emergence of a ferromagnetic-metal phase when Ca2Ru2O7 is doped with electrons.
Article
Chemistry, Multidisciplinary
Wenbo Wang, Yi-Fan Zhao, Fei Wang, Matthew W. Daniels, Cui-Zu Chang, Jiadong Zang, Di Xiao, Weida Wu
Summary: In this study, evidence of an emergent topological Hall effect from chiral bubbles in a two-dimensional ferromagnet was reported. The sign of the THE signal is determined by the net curvature of domain walls in different configurations, and the strength of the signal is correlated with the density of nucleation or pinned bubble domains. The findings not only reveal a general mechanism of THE in two-dimensional ferromagnets but also open up possibilities for the manipulation of topological spin textures for spintronic applications.
Article
Chemistry, Multidisciplinary
Jennifer P. P. Allen, Clare P. P. Grey
Summary: Dissolved transition metal ions can cause peak shifts in NMR spectra of degraded battery electrolytes. In this study, we use this simple and accessible method to calculate magnetic moments for dissolved Ni2+, Mn2+, Co2+, and Cu2+; further analysis of dissolution from LiMn2O4, LiNiO2, and LiNi0.5Mn1.5O4 reveals that the dissolved metals are exclusively divalent.
CHEMICAL COMMUNICATIONS
(2023)
Article
Physics, Condensed Matter
Mohammad Nasir, Sunil Kumar, Anup Kumar Bera, Mahmud Khan, S. M. Yusuf, Somaditya Sen
Summary: The physical properties of Mn-rich, nonstoichiometric La2Ni0.5Mn1.5O6 ferromagnetic insulator prepared by sol-gel method were reported. The compound exhibited a single-phase orthorhombic structure, high saturation magnetization at 5 K, and a ferromagnetic to paramagnetic transition at 162 K. The presence of spin-glass type magnetic interactions was confirmed through ac magnetic susceptibility measurements, with a relaxation time of the order of 10(-5) s. The origin of the cluster spin-glass state was discussed in terms of various magnetic exchange interaction pathways among Ni and Mn ions.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Chemistry, Physical
Claudio Giorgi, Angelo Morro
Summary: The hysteresis models for ferromagnetic materials are established using a thermodynamic approach. The constitutive properties must comply with the second law and the Euclidean invariance. The representation of magnetic field and magnetization is done using invariant vectors. The article also provides a detailed model for the magnetization function and solves nonlinear ordinary differential equations to obtain hysteresis cycles.
Article
Materials Science, Multidisciplinary
Alisha Rohal, Asmita Shah, Mayanglambam Manolata Devi, Suvankar Chakraverty, Bhanu Prakash
Summary: A new type of nickel vanadium (Ni:V) LDH material with a ferromagnetic-insulating state has been synthesized via hydrothermal methods, showing potential for various applications and opening a new research path in the field of magnetic/electrostatic memory materials.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jun Sugiyama, Wataru Higemoto, Daniel Andreica, Ola Kenji Forslund, Elisabetta Nocerino, Martin Mansson, Yasmine Sassa, Ritu Gupta, Rustem Khasanov, Hiroto Ohta, Hiroyuki Nakamura
Summary: The magnetic properties of quasi-one-dimensional compound BaVSe3 were investigated using positive muon spin rotation and relaxation measurements under ambient and high pressures. It was found that the V moments in BaVSe3 align ferromagnetically along the c axis but slightly canted toward the a axis. The muon spin precession frequencies at two magnetically different muon sites could not be adequately explained with simple ferromagnetic structures, and Tc was observed to decrease slightly before increasing rapidly with pressure. The study also revealed two magnetic interactions in the ab plane at different pressures, with one being antiferromagnetic and the other ferromagnetic.
