Article
Engineering, Electrical & Electronic
Clemens Muehlenhoff, Christoph Vogler, Wolfgang Raberg, Dieter Suess, Manfred Albrecht
Summary: Magnetoresistive sensors are widely used in low field environments, but Hall sensors dominate high field applications due to their wider linear range. Utilizing a perpendicularly magnetized reference system and in-plane free layer overcomes this disadvantage, allowing for investigation of spin-canting effects in interlayer exchange coupled perpendicular synthetic antiferromagnets (p-SAF).
IEEE SENSORS JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
P. T. Tho, N. Tran, N. T. M. Hong, N. N. Tran, L. T. Ha, P. T. Phong, D. V. Karpinsky, C. T. A. Xuan
Summary: The external magnetic field is used to control the spin states at the phase boundary in BiFeO3-based ceramics. The spin states can transform from unfrustrated to frustrated under a magnetic field larger than a critical value, leading to an increase in net magnetization during a sweep decrease of magnetic field. The frustrated spin states form a ferromagnetic configuration and interact with intrinsic antiferromagnetic spins, resulting in vertical magnetization shift, field step-dependent hysteresis loop, and training effects. The unique properties of the spin states at the phase boundary allow for control of coercivity and magnetization by magnetic field.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Multidisciplinary Sciences
Andrew D. King, Cristiano Nisoli, Edward D. Dahl, Gabriel Poulin-Lamarre, Alejandro Lopez-Bezanilla
Summary: Artificial spin ices are frustrated spin systems that can be engineered to allow the design and characterization of exotic emergent phenomena. In this study, a realization of spin ice in a lattice of superconducting qubits was reported, showing control over a fragile degeneracy point and the demonstration of Gauss's law for emergent effective monopoles in two dimensions. This qubit control paves the way for potential future study of topologically protected artificial quantum spin liquids.
Article
Physics, Applied
Yinong Yin, Fanfan Shi, Guo-Qiang Liu, Xiaojian Tan, Jun Jiang, Ashutosh Tiwari, Baohe Li
Summary: This study investigates the magnetic properties and magnetocaloric performance of two high-entropy perovskites. It is found that a spin-glass phase occurs at low temperatures in the high-entropy compounds, leading to a sluggish magnetic transition. The increase in configurational entropy results in large refrigerant capacity for these materials.
APPLIED PHYSICS LETTERS
(2022)
Article
Crystallography
Diana Lucia Quintero-Castro, Juanita Hincapie, Abhijit Bhat Kademane, Minki Jeong, Matthias Frontzek, Alexandra Franz, Amutha Ramachandran, Fabiano Yokaichiya, J. Ross Stewart, Rasmus Toft-Petersen
Summary: We conducted a systematic study on the structural and magnetic properties of SrYb2-xErxO4 powder samples with different Yb/Er concentrations. By using magnetometry, neutron diffraction, and inelastic neutron scattering, we examined the magnetic ground states, crystal field excitations, and phase transitions in the compound series. The results showed that the crystal structure remained the same for all compositions, but the lattice parameters increased linearly with the Er content. The magnetic structure and nature of the phase transition varied throughout the series, with non-collinear and collinear magnetic structures observed for low and high Er content, respectively.
Article
Materials Science, Multidisciplinary
Xing Huang, Zhiying Zhao, Mengsi Zhang, Yanqi Wang, Zhangzhen He
Summary: Single crystals of Fe-2(TeO3)(2)(SO4)·3H2O with an alternating spin-chain structure exhibit short-range and long-range antiferromagnetic orders, along with a significant magnetic anisotropy. This anisotropy is attributed to a strong nonsymmetric distortion in the FeO6 octahedra.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Shuxuan Tang, Xinping Wang
Summary: Spin frustration, resulting from geometric frustration and the inability to simultaneously satisfy all antiferromagnetic interactions, is highly important in physics and materials science. Organic radical species, with their flexible chemical structures, show great potential in building spin-frustrated molecules and lattices.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Xiaoyu Zhang, Ayhan Duzgun, Yuyang Lao, Shayaan Subzwari, Nicholas S. Bingham, Joseph Sklenar, Hilal Saglam, Justin Ramberger, Joseph T. Batley, Justin D. Watts, Daniel Bromley, Rajesh Chopdekar, Liam O'Brien, Chris Leighton, Cristiano Nisoli, Peter Schiffer
Summary: The study demonstrates that Boltzmann-distributed strings of local excitations can describe the topological physics of the Santa Fe geometry, which shows strong correlations and applies to classical systems. Experimental results show that the string length follows a simple Boltzmann distribution with an energy scale related to magnetic interactions and consistent with theoretical predictions.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Applied
Peter Schiffer, Cristiano Nisoli
Summary: Artificial spin ice systems are arrays of interacting nanoscale magnetic moments with collective behavior, designed based on chosen array geometry. Research in artificial spin ice has expanded beyond the original focus, now encompassing structures exhibiting a wider range of physical phenomena.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
T. Strusch, K. Lenz, R. Meckenstock, R. Bali, J. Ehrler, J. Lindner, J. Fassbender, M. Farle, K. Potzger, A. Semisalova
Summary: In this study, we investigate the spin pumping efficiency and determine the spin mixing conductance and spin diffusion length in thin bilayer films based on 3d transition metal alloy Fe60Al40. We demonstrate that the Fe60Al40 alloy exhibits dual functionality in spin pumping structures, which may have potential value in spintronic applications.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Multidisciplinary
Vineeth Mohanan Parakkat, Gavin M. Macauley, Robert L. Stamps, Kannan M. Krishnan
Summary: This research demonstrates the tunability of the ground state for a hybrid artificial spin ice made of Fe nanomagnets, with three distinct magnetic textures identified by varying site-specific exchange-bias fields: a striped ferromagnetic phase, an antiferromagnetic phase achievable through external field protocols, and an unconventional ground state with magnetically charged pairs embedded in an antiferromagnetic matrix. Monte Carlo simulations support the results of field protocols and show that pinning tunes relaxation timescales and critical behavior.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
D. Laura-Ccahuana, E. De Biasi
Summary: In this work, we investigated the surface effects on small antiferromagnetic nanoparticles with diameters less than or equal to 11 nm and Ne'el temperature around 12 K under spin-flop conditions using Montecarlo simulations. Our results showed that decreasing the particle size led to an increase in the effective anisotropy and spin-flop field of the system. The influence of surface anisotropy induced magnetic disorder, which was manifested in the magnetization curves as a function of applied field and temperature. We developed a simple model that reproduced the observed behaviors for low temperatures.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Hyeon-Kyu Park, Sang-Koog Kim
Summary: The study theoretically explored the ultrafast propagations of spin waves in antiferromagnetic Bloch-type domain walls and found that the dispersive relation of these spin waves shows extremely high group velocity without any forbidden gap. The results offer guidance for the development of ultrafast information signal processing in nanoscale magnonic circuits composed of antiferromagnetic domain walls.
Article
Materials Science, Multidisciplinary
Vishal Kumar, Gaurav K. K. Shukla, Nisha Shahi, Sanjay Singh
Summary: Topologically protected nontrivial spin structures have attracted significant interest in the field of condensed matter physics due to their potential applications in low-power-consumption spintronics devices and memory devices. The topological Hall effect (THE) is an extra Hall resistivity that arises from real-space Berry curvature in materials with nontrivial spin texture. In this study, THE in the (Mn1-xFex)(3.25)Ge (x = 0.4) alloy was investigated using magneto-transport measurements. The results showed that the maximum THE in the system was about 0.65 μΩcm at 150 K, in contrast to the zero THE in the pristine Mn3Ge. The strong temperature dependence of THE indicated that the noncoplanar spin structure, resulting from the competition among magneto-crystalline anisotropy, antiferromagnetic coupling, and ferromagnetic exchange interaction, was the main source of THE in the present system. Moreover, chemical doping was shown to be an effective approach to induce THE in materials with zero THE in their parent phase.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Xiao Hu, A. Sapkota, V. O. Garlea, G. D. Gu, I. A. Zaliznyak, J. M. Tranquada
Summary: The dominant magnetic interaction in La2CuO4 is superexchange between nearest-neighbor Cu moments, but the pinning of the spin direction depends on weak anisotropic effects associated with spin-orbit coupling. The symmetry of the octahedral tilt pattern allows for out-of-plane canting of the Cu spins, which can be compensated by opposite canting in nearest-neighbor layers. Applying a strong magnetic field perpendicular to the planes can induce a weak ferromagnetic phase by altering the spin canting pattern.
Article
Chemistry, Inorganic & Nuclear
Mengsi Zhang, Yujie Song, Zhiying Zhao, Jinyang Li, Wanwan Zhang, Yaxin Xie, Xing Huang, Xiaoying Huang, Zhangzhen He
INORGANIC CHEMISTRY
(2020)
Article
Chemistry, Inorganic & Nuclear
Wanwan Zhang, Zhangzhen He, Yaxin Xie, Xiaoying Huang
JOURNAL OF SOLID STATE CHEMISTRY
(2020)
Article
Chemistry, Physical
Zhilue Wang, Shoujiang Qu, Hongping Xiang, Zhangzhen He, Jun Shen
Article
Chemistry, Inorganic & Nuclear
Yaxin Xie, Wanwan Zhang, Ming Yang, Zhiying Zhao, Zhangzhen He
INORGANIC CHEMISTRY
(2020)
Article
Chemistry, Inorganic & Nuclear
Xiaoyun Lan, Xing Huang, Meiyan Cui, Zhiying Zhao, Zhangzhen He
Summary: A new selenite compound CaCu(SeO3)(2) with a spin-dimer structure was synthesized by a hydrothermal method. It exhibits a nonmagnetic singlet ground state and a large spin gap of ~329 K. The spin-gap behavior is attributed to the change in bonding geometry of spin dimers caused by the substitution of Ca2+ ions for Hg2+ ions. The compound also has an optical band gap of 2.71 eV.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Huiyu Wang, Zhiying Zhao, Meiyan Cui, Yanqi Wang, Zhangzhen He
Summary: The fluorophosphate compounds A(3)Fe(4)(PO4)(2)F-9 exhibit a channel framework constructed from {Fe4O8F10} tetrahedral clusters and PO4 tetrahedra, synthesized by a fluorine-rich hydrothermal method. The purity of the samples was characterized by various measurements. Both compounds show antiferromagnetic ordering, indicating strong spin frustration in the systems.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Ningxia Li, Qi Luo, Meiyan Cui, Zhiying Zhao, Zhangzhen He
Summary: New fluorophosphate compounds with an open framework structure were synthesized and characterized. One of the compounds exhibited antiferromagnetic behavior.
SOLID STATE SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Jinyang Li, Zhiying Zhao, Xing Huang, Meiyan Cui, Zhangzhen He
Summary: The study reports the successful exploration of a new compound BaNa2Co7Te3O18 with a unique spin lattice and magnetic properties. Analysis of magnetic and heat capacity data revealed large magnetic anisotropy and partial long-range order in the system.
CHEMICAL COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Z. Y. Zhao, X. Y. Yue, J. Y. Li, N. Li, H. L. Che, X. F. Sun, Z. Z. He
Summary: This paper reports the magnetic ground state and field-induced transitions of an S = 1/2 Ising antiferromagnet with a stacked kagome geometry, Na5Co15.5Te6O36. The experimental results reveal successive magnetic transitions at different temperatures and the observation of anomalous initial magnetization when a magnetic field is applied.
Article
Materials Science, Multidisciplinary
Shojiro Kimura, Hiroaki Onishi, Akira Okutani, Mitsuru Akaki, Yasuo Narumi, Masayuki Hagiwara, Kouichi Okunishi, Koichi Kindo, Zhangzhen He, Tomoyasu Taniyama, Mitsuru Itoh
Summary: In this study, the selection rules of optical transitions in BaCo2V2O8 were clarified using high-field electron spin resonance measurement. It was found that unconventional magnetic excitation can couple with both magnetic and electric fields in the field-induced quantum critical state. This coupling mechanism is attributed to the periodic spin interactions and magnetoelectric coupling in BaCo2V2O8.
Article
Chemistry, Inorganic & Nuclear
Xing Huang, Zhiying Zhao, Yanqi Wang, Mengsi Zhang, Zhangzhen He
Summary: Two new selenite compounds, CaNi and NaCu, were synthesized through a hydrothermal method, exhibiting different magnetic properties and band gap energies. Both compounds show stability at low temperatures, indicating potential applications.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Mengsi Zhang, Meiyan Cui, Zhiying Zhao, Xing Huang, Zhangzhen He
Summary: The successful synthesis of a new Cu2+-based two-leg ladder compound is reported in this study, showing a spin singlet ground state and a large spin gap. Magnetic results indicate a broad peak at around 265 K. The fitting of the isolated two-leg spin-ladder model suggests significant values for J(perpendicular to)/k(B) and J(||)/k(B).
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Shaowu Du, Meiyan Cui, Zhangzhen He
Summary: A new pentanuclear {Co-5} cluster motif with a D-3h oblate trigonal bipyramidal geometry was discovered, forming a unique capped breathing kagome lattice. Magnetic results indicated paramagnetism at 2 K, with the disappearance of two-thirds of the spin moment at low temperatures and the appearance of a 1/5 magnetization plateau.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Xing Huang, Zhiying Zhao, Mengsi Zhang, Zhangzhen He
Summary: A new selenite compound CaNi2(SeO3)(3)·2H2O was synthesized with a distorted zemannite-type structure. Dehydration led to the formation of partially dehydrated and anhydrous forms, each exhibiting different magnetic behaviors, with magnetic transitions observed in all three compounds.
Article
Chemistry, Multidisciplinary
Mengsi Zhang, Zhiying Zhao, Wanwan Zhang, Jinyang Li, Xiaoying Huang, Zhangzhen He
CHEMICAL COMMUNICATIONS
(2020)
