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Displaying 301 - 325 of 3361

Magnetic Normal Modes of Nanoelements

May 1, 2005
Author(s)
Robert D. McMichael, Mark D. Stiles
… and precession patterns of some of the lowest-frequency magnetic normal modes of submicron patterned elements. For a … eigenfrequencies, magnetic normal modes, nano-elements, submicron patterned … Magnetic Normal Modes of Nanoelements …

Frustrated Magnetic Interactions and Quenched Spin Fluctuations in CrAs

November 1, 2022
Author(s)
Yayuan Qin, Yao Shen, Yiqing Hao, Hongliang Wo, Shoudong Shen, Russell A. Ewings, Yang Zhao, Leland Harriger, Jeffrey Lynn, Jun Zhao
… However, the nature of the magnetism and magnetic interactions that drive the unusual double-helical magnetic order in these materials remain unclear. Here, we report neutron scattering measurements of magnetic excitations in CrAs single crystals at ambient …

Radio-Frequency Toroid Susceptometry of Magnetic Nanoparticles: What Goes Around Comes Around

January 26, 2026
Author(s)
Ronald Goldfarb
… The intrinsic magnetic susceptibility of noninteracting magnetic nanoparticles is calculated from the measured … at frequencies above their Néel relaxation frequency. Magnetic figures of merit for nanoparticles are the real and … dipole interactions, ferrofluids, impedance analyzers, magnetic relaxation, magnetic susceptibility, magnetic …

Thermosensitivity Through Exchange Coupling in Ferrimagnetic/Antiferromagnetic Nano-Objects for Magnetic Based Thermometry

March 6, 2023
Author(s)
Frank Abel, Eduardo De Lima Correa, Adam Biacchi, Thinh Bui, Solomon I. Woods, Angela R. Hight Walker, Cindi L. Dennis
… at microscale resolution is currently limited. Thermal magnetic particle imaging (T-MPI), a temperature variant of magnetic particle imaging (MPI), hopes to solve this deficiency. For this thermometry technique, magnetic nano-objects (MNOs) with strong … magnetic nano-objects, FiM/AFM exchange coupling, colloidal …

Phase Diagram of YbZnGaO 4 in Applied Magnetic Field

September 15, 2021
Author(s)
William Steinhardt, P. A. Maksimov, Sachith Dissanayake, Zhenzhong Shi, Nicholas Butch, David Graf, Andrey Podlesnyak, Yaohua Liu, Yang Zhao, Guangyong Xu, Jeffrey Lynn, Casey Marjerrison, A. L. Chernyshev, Sara Haravifard
… degree of disorder owing to site-mixing between the non-magnetic cations. To further elucidate role of chemical … compound, YbZnGaO 4 . We use key observations of the magnetic phase crossover to motivate an exploration of the … phase diagram, providing an expanded view of the available magnetic states in applied field. This enriched map of the …

Magnetic Order and Instability in Newly Synthesized CoSeAs Marcasite

May 13, 2020
Author(s)
Yiyao Chen, G. Yumnam, A. Dahal, Jose Rodriguez Rivera, Guangyong Xu, T. Heitmann, D. K. Singh
… material using neutron scattering measurements reveal weak magnetic correlation of cobalt ions below Τ = 36.2 K. The … Magnetic Order and Instability in Newly Synthesized CoSeAs …

Resonant Spin Transmission Mediated by Magnons in a Magnetic Insulator Multilayer Structure

June 3, 2021
Author(s)
Yabin Fan, Joseph Finley, Jiahao Han, Megan E. Holtz, Patrick Quarterman, Pengxiang Zhang, Taqiyyah S. Safi, Justin T. Hou, Alexander Grutter, Luqiao Liu
… has not been explored for magnons in nanoscale magnetic structures. Here, by exploiting magnon thin-film … interference and magnon-magnon interaction in a Pt/magnetic-insulator/magnetic-metal multilayer structure, we demonstrate efficient … Magnetic insulators, spin waves, thin films, spin transport …

Electric field control of the magnetic state in Bi Fe O3 single crystals

May 12, 2008
Author(s)
Seoungsu Lee, William D. Ratcliff, S.-W. Cheong, V. Kiryukhin
… switches ferroelastic domains, inducing changes in the magnetic structure which follows rotation of the structural … can be used to control the populations of the equivalent magnetic domains within a single ferroleastic domain, … Electric field control of the magnetic state in Bi Fe O3 single crystals …

Field-Angle Evolution of the Superconducting and Magnetic Phases of UTe2 around the b Axis

November 27, 2024
Author(s)
Sylvia Lewin, Josephine Yu, Corey Frank, David Graf, Patrick Chen, Sheng Ran, Yun Eo, Johnpierre Paglione, S. Raghu, Nicholas Butch
… We experimentally determine the bounds of the magnetic-field-induced superconducting and magnetic phases near the crystalline b axis of uranium … as a function of rotation angle and field strength in magnetic fields as large as 41.5 T, we have studied these … Superconductivity, high magnetic fields, heavy fermion …

Tailoring the Magnetic Exchange Interaction in MnBi2Te4 Superlattices via the Intercalation of Ferromagnetic Layers

January 1, 2023
Author(s)
Peng Chen, Qi Yao, Junqi Xu, Qiang Sun, Alexander Grutter, Patrick Quarterman, Purnima P. Balakrishnan, Christy J. Kinane, Andrew J. Caruana, Sean Langridge, Ang Li, Barat Achinuq, Emily Heppell, Yuchen Ji, Shanshan Liu, Baoshan Cui, Jiuming Liu, Puyang Huang, Zhongkai Liu, Guoqiang Yu, Faxian Xiu, Thorsten Hesjedal, Jin Zou, Xiaodong Han, Haijun Zhang, Yumeng Yang, Xufeng Kou
… The intrinsic magnetic topological insulator MnBi 2 Te 4 (MBT) has provided … the modulation of relative strengths among the constituent magnetic orders, leading to tunable magnetoelectric … advantages of superlattice engineering for optimizing the magnetic interactions in MBT-family systems, and the …

Quasiparticle-Continuum Level Repulsion in a Quantum Magnet

March 1, 2016
Author(s)
K. W. Plumb, Kyusung Hwang, Yiming Qiu, Leland Harriger, G. E. Granroth, Alexander I. Kolesnikov, G. J. Shu, F. C. Chou, Ch. Ruegg, Yong Baek Kim, Young-June Kim
… study of magnetic quasiparticles in a frustrated quantum magnet BiCu 2 PO 6 , we observe a renormalization of … frustrated quantum magnet, continuum … Quasiparticle-Continuum Level Repulsion in a Quantum Magnet …

Effects of disorder on magnetic vortex gyration

February 15, 2011
Author(s)
Hongki Min, Robert McMichael, Jacques Miltat, Mark D. Stiles
… A vortex gyrating in a magnetic disc has two regimes of motion in the presence of … magnetic vortex, micromagnetics, gyration, magnetic damping, precession, Landau-Lifshitz-Gilbert … Effects of disorder on magnetic vortex gyration …

Nanoscale imaging of magnetization reversal driven by spin-orbit torque

September 23, 2016
Author(s)
Ian J. Gilbert, Andrew P. Chen, Daniel B. Gopman, Andrew L. Balk, Daniel T. Pierce, Mark D. Stiles, John Unguris
… (SEMPA) to image deterministic, spin-orbit torque driven magnetization reversal of in-plane magnetized CoFeB … which the CoFeB rectangles are deposited. We image the magnetization before and after a current pulse to see the … larger elements. Overall, however, the directions of the magnetization reversal in the Pt and Ta devices are opposite, …

Tuning the Magnetic Anisotropy in artificially layered Mn3GaN/Mn3Ga Superlattices

January 31, 2024
Author(s)
Lu Guo, Neil Campbell, Alexander Grutter, Gahee Noh, Tianxiang Nan, P. Quarterman, Si-Young Choi, Thomas Tybell, Mark Rzchowski, Chang-Beom Eom
… structures offer new opportunities for manipulation of magnetic properties and interfacial spin configurations. We … unit cell. This allows investigation of the interfacial magnetic interactions. Through a combination of … Mn3Ga/Mn3GaN superlattice structures have the out-of-plane magnetic anisotropy decreased compared to Mn3Ga single-layer …

Simultaneous Measurement of Magnetic Vortex Polarity and Chirality using Scanning Electron Microscopy with Polarization Analysis (SEMPA)

February 16, 2010
Author(s)
Seok-Hwan Chung, Daniel T. Pierce, John Unguris
… The magnetic vortex structure is an equilibrium configuration frequently found in patterned magnetic nanostructures. It is characterized by an in-plane … with Polarization Analysis (SEMPA) to directly image magnetic vortex cores in patterned NiFe/Ta bilayer … magnetic vortex, magnetic vortex core, scanning electron …

Emergent Magnetic State in (111)-Oriented Quasi-Two-Dimensional Spinel Oxides

December 11, 2019
Author(s)
Xiaoran Liu, Sobhit Singh, Brian Kirby, Zhicheng Zhong, Yanwei Cao, Banabir Pal, Mikhail Kareev, Srimanta Middey, John W. Freeland, Padraic Shafer, Elke Arenholz, David Vanderbilt, Jak Chakhalian
… We report on the emergent magnetic state of (111)-oriented CoCr 2 O 4 ultrathin films … compared to the bulk value. Synchrotron x-ray magnetic circular dichroism (XMCD) demonstrates the … the observed phenomena are due to the strongly altered magnetic frustration, manifested by the onset of a …

Roadmap of spin-orbit torques

May 10, 2021
Author(s)
Qiming Shao, Li Peng, Luqiao Liu, Hyunsoo Yang, Shunsuke Fukami, Armin Razavi, Hao Wu, Kang L. Wang, Frank Freimuth, Yuriy Mokrousov, Mark D. Stiles, Satoru Emori, Axel Hoffmann, Johan Akerman, Kaushik Roy, Jian-Ping Wang, See-Hun Yang, Kevin Garello, Wei Zhang
Spin-orbit torque (SOT) is an emerging technology that enables the efficient manipulation of spintronic devices. The initial processes of interest in SOTs involved electric fields, spin- orbit coupling, conduction electron spins and magnetization. More

Accuracy of magnetic resonance based susceptibility measurements

February 6, 2017
Author(s)
Hannah E. Erdevig, Stephen E. Russek, Slavka Carnicka, Karl F. Stupic, Kathryn E. Keenan
… Magnetic Resonance Imaging (MRI) is increasingly used to map the magnetic susceptibility of tissue to identify cerebral … noninvasive clinical diagnosis and treatment assessments. Magnetic field distortions with a resolution of a few parts … MRI, magnetic susceptibility, Quantitative Susceptibility Mapping, …

Deciphering Structural and Magnetic Disorder in the Chiral Skyrmion Host Materials Co x Zn^y^Mn z (x + Y + z = 20)

January 1, 2019
Author(s)
Joshua D. Bocarsly, Colin A. Heikes, Craig Brown, Stephen D. Wilson, Ram Seshadri
… are found at equilibrium in a small pocket just below the magnetic Curie temperature. Remarkably, Co x Zn y Mn z … density functional theory calculations, and DC and AC magnetic measurements, to characterize the atomic and magnetic disorder in these materials. We demonstrate that Co …

Parahydrogen-enhanced zero-field nuclear magnetic resonance

May 1, 2011
Author(s)
Svenja A. Knappe, T. Theis, P. Ganssle, G Kervem, M Ledbetter, D Budker, A Pines, John E. Kitching
… Nuclear magnetic resonance (NMR) is a powerful analytical tool for … research. Conventionally, NMR is performed in multiTesla magnetic fields in order to produce nuclear spin polarization … of inductive pickup. Despite the use of such large magnetic fields, the nuclear spin-polarization is still quite …

Chiral Spin Bobbers in Exchange-Coupled Hard-Soft Magnetic Bilayers

November 17, 2021
Author(s)
X. H. Zhang, T. R. Gao, L. Fang, S. Fackler, Julie Borchers, Brian Kirby, Brian B. Maranville, S. E. Lofland, A. T. N'Diaye, E. Arenholz, A. Ullah, J. Cui, R. Skomski, Ichiro Takeuchi
… MnBi:Co-Fe bilayers is investigated by X-ray magnetic circular dichroism (XMCD), polarized neutron … important aspect of this quest. Second, topological micro-magnetic structures such as skyrmions have recently become of … film plane. This curling in the exchange-coupled hard-soft magnetic bilayers is reminiscent of chiral spin structures …
Displaying 301 - 325 of 3361
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