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Displaying 276 - 300 of 3361

The Magnetic Transitions and Dynamics in the Multiferroic Lu 0.5 Sc 0.5 FeO 3

February 26, 2016
Author(s)
Junjie Yang, Chunruo Duan, John R. Copley, Craig Brown, Despina Louca
… multiferroic Lu 0.5 Sc 0.5 FeO 3 exhibits two consecutive magnetic transitions at T% N1 approximately equal to}175 K … determined from neutron diffraction. In the ordered state, magnetic fluctuations are present, most likely arising from … the Fe hexagonal lattice. Furthermore, a crossover of the magnetic intensity is observed from elastic to inelastic upon …

Multi-Step Magnetic Switching in Single-Crystal (001) Co 2 MnGe Films

April 23, 2002
Author(s)
F Y. Yang, C H. Shang, T Ambrose, J J. Krebs, G A. Prinz, Valerian I. Nikitenko, V S. Gornakov, Alexander J. Shapiro, Robert D. Shull, C L. Chien
… Multi-step magnetic switching with single, double, and triple loops has … grown on GaAs (001) substrates due to a combined magnetic anisotropy consisting of cubic magnetocrystalline … magneto-optical indicator film (MOIF) imaging technique. Magnetic domains and domain walls, as well as the coherent …

Magnetic dynamics with spin transfer torques near the Curie temperature.

September 24, 2009
Author(s)
Paul M. Haney, Mark D. Stiles
… fluctuations and spin transfer torques on the behavior of magnetic layers in spin valves. We find that at temperatures … the applied-field applied-current phase diagram for a free magnetic layer, valid for temperatures near the Curie … at high temperatures, and also find the thermally averaged magnetic dynamics within mean field theory, yielding a …

Tailoring Exchange Couplings in Magnetic Topological Insulator/Antiferromagnet Heterostructures

January 1, 2017
Author(s)
Qing Lin He, Xufeng Kou, Alexander Grutter, Gen Yin, Lei Pan, Xiaoyu Che, Yuxiang Liu, Tianxiao Nie, Bin Zhang, Steven M.T. Disseler, Brian Kirby, William D. Ratcliff, Qiming Shao, Koichi Murata, Xiaodan Zhu, Guoqiang Yu, Yabin Fan, Mohammad Montazeri, Xiaodong Han, Julie Borchers, Kang L. Wang
… Magnetic topological insulators such as Cr-doped (Bi,Sb) 2 Te … the unique Neel order in an antiferromagnetic CrSb and the magnetic topological order in Cr-dopped (Bi,Sb) 2 Te 3 , we realize emergent interfacial magnetic phenomena which can be tailored through artificial …

Structure, spin-dynamics, and magnetic properties of annealed nanoscaled Fe layers on GaAs

February 2, 2007
Author(s)
Justin Shaw, Charles M. Falco
… Using Brillouin light scattering, we studied the magnetic properties and spin dynamics of these layers and find a strong correlation between magnetic properties and the structure and chemical … layers results in the formation of a discontinuous magnetic layer with increased crystal order. At slightly …

Reduction of Large Hysteresis Losses in the Gd 5 uGe 2 uSi 2 u Magnetic Refrigerant Compound by a Small Alloying Addition of Iron

June 24, 2004
Author(s)
Virgil Provenzano, Alexander J. Shapiro, Robert D. Shull
… the large hysteresis losses observed in the Gd5Ge2Si2 magnetic refrigerant compound in the 270 K-300 K temperature … effects. Before this material can be effectively used as a magnetic refrigerant, its large hysteretic losses need to be … the Gd5Ge2Si2 compound with a small amount of iron. The magnetic entropy change, Sm, of the iron-containing alloy …

Enhanced ferromagnetic resonance linewidth of the free layer in perpendicular magnetic tunnel junctions

March 3, 2017
Author(s)
Daniel B. Gopman, Cindi L. Dennis, Robert D. McMichael, Xiaojie Hao, Zihui Wang, Xiaobin Wang, Huadong Gan, Yuchen Zhou, Jian Zhang, Yiming Huai
… the ferromagnetic resonance linewidth of the free layer in magnetic tunnel junctions with all perpendicular-to-the-plane magnetized layers. While the magnetic-fi eld-swept linewidth nominally shows a linear … absorption spectra for increasing- and decreasing external magnetic field. Inhomogeneous magnetic fields produced during …

Magnetic Order Effects on the Electronic Structure of KMMnSd2^ (M=Cu,Li) with the ThCr 2 Si 2 -Type Structure

April 30, 2019
Author(s)
Austin Virtue, Xiuquan Zhou, Brandon Wilfong, Jeffrey W. Lynn, Keith Taddei, Peter Zavalij, Limin Wang, Efrain E. Rodriguez
… We propose three magnetic structures for KCuMnS^26 with the ThCr 2 Si 2 -type … studies reveal that KCuMnS 2 exhibits long-range magnetic ordering with a Neel temperature near 160 K and a … 2+ at 6 K. In contrast, KLiMnS 2 never exhibits long-range magnetic ordering down to 3.5 K. Both sulfides never display …

Superexchange mediated magnetization dynamics in a 2D checkerboard optical lattice

May 1, 2015
Author(s)
Elizabeth A. Goldschmidt, Roger C. Brown, Silvio B. Koller, Michael S. Foss-Feig, James V. Porto, Robert Wyllie
… and non-equilibrium physics. Here, we study the magnetization dynamics of effective spin-1/2 bosons in a 2D … Superexchange mediated magnetization dynamics in a 2D checkerboard optical lattice …

Spin-Phonon Couplings in Transition Metal Complexes with Slow Magnetic Relaxation

July 3, 2018
Author(s)
Duncan H. Moseley, Shelby E. Stavretis, Komalavalli Thirunavukkuarasu, Mykhaylo Ozerov, Yongqiang Cheng, Luke L. Daemen, Jonathan Ludwig, Zhengguang Lu, Dmitry Smirnov, Craig Brown, Anup Pandey, A. J. Ramirez-Cuesta, Adam C. Lamb, Mihail Atanasov, Eckhard Bill, Frank Neese, Zi-Ling Xue
… transition metal complex, displays field-induced slow magnetic relaxation as a single-molecule magnet. Raman … 7 ) 2 (D 2 O 2 ) 2 (1-d 18 ) reveal that, without applied magnetic fields, their zero-field splitting (ZFS) transition is coupled to a g phonon. With applied magnetic fields, the ZFS transition, shifting in energy, …

Effect of Iron Vacancies on Magnetic Order and Spin Dynamics of the Spin Ladder BaFe 2-d S 1.5 Se 1.5

June 13, 2022
Author(s)
Zengjia Liu, Xiao-Sheng Ni, Lisi Li, Hualei Sun, Feixiang Liang, Benjamin Frandsen, Andrew D. Christianson, Clarina dela Cruz, Zhijun Xu, Dao-Xin Yao, Jeffrey Lynn, Robert J. Birgeneau, Kun Cao, Meng Wang
… Quasi-one-dimensional iron chalcogenides possess various magnetic states depending on the lattice distortion, … with ∼6% iron vacancies. The data reveal that long-range magnetic order is absent, while the characteristic magnetic excitations that correspond to both the stripe- and …

Control of magnetic fluctuations by spin current

September 2, 2011
Author(s)
Vladislav E. Demidov, Sergei Urazhdin, Eric Edwards, Mark D. Stiles, Robert McMichael, Sergej O. Demokritov
… of spin current generated by the spin Hall effect with magnetic fluctuations in a Permalloy microdisc. We show that … Additionally, we find that the effect of spin current on magnetic fluctuations is strongly influenced by nonlinear … spin-transfer torque, magnetization dynamics, magnetic damping, ferromagnetic resonance, spin current, spin …

Understanding Signatures of Emergent Magnetism in Topological Insulator/Ferrite Bilayers

March 24, 2022
Author(s)
Lauren J. Riddiford, Alexander Grutter, Timothy Pillsbury, Max Stanley, Danielle Reifsnyder Hickey, Peng Li, Nasim Alem, Nitin Samarth, Yuri Suzuki
… heterostructures have been studied in search of induced magnetism in the topological insulator, but chiral edge … Topological insulator, quantum materials, Proximity effect, Magnetism, Interface, Neutron Scattering … Understanding Signatures of Emergent Magnetism in Topological Insulator/Ferrite Bilayers …

Nanoscale Magnetization Inhomogeneity within Single Phase Nanopillars

August 1, 2019
Author(s)
Thomas O. Farmer, Er-Jia Guo, Ryan D. Desautels, Lisa Debeer-Schmitt, Aiping Chen, Zhongchang Wang, Quanxi Jia, Julie Borchers, Dustin A. Gilbert, Ben Holladay, Sunil K. Sinha, Michael R. Fitzsimmons
… of the magnetic hysteresis loops and elucidated the magnetization reversal mechanism: the magnetization initially reorients within the pillar core, … neutron scattering which can be described by a CoFe 2 O 4 magnetization that is non-uniform on nanometer length scales. …

Single bead detection with a NMR micro capillary probe

December 6, 2012
Author(s)
Yoshihiro Nakashima, Michael A. Boss, Stephen E. Russek, John M. Moreland
We have developed a nuclear magnetic resonance (NMR) microcapillary probe for the detection of single magnetic microbeads. The geometry of the probe has been optimized so that the signal from the background water has a similar magnitude compared to the

256-Channel Magnetic Imaging System

January 18, 2008
Author(s)
Fabio C. da Silva, Sean Halloran, Anthony B. Kos, David P. Pappas
… a host computer. The system was successfully used to image magnetic tapes for real-time forensic validation purposes and … Imaging, Magnetic Sensors, Magnetoresistance … 256-Channel Magnetic Imaging System …

Large Magnetic Susceptibility Anisotropy of Metallic Carbon Nanotubes

July 2, 2010
Author(s)
Jeffrey A. Fagan, Erik K. Hobbie, Jun Kono, Thomas Searles, Y Imanaka, T Takamasu, H Ajiki
… Through magnetic linear dichroism spectroscopy, the magnetic susceptibility anisotropy of metallic single-walled … which con¯rm a break from the prediction that the magnetic susceptibility anisotropy increases linearly with … nanotube, SWNT, SWCNT, magnetic field, alignment, dichroism …

Observation of iron oxide nanoparticle growth in magnetogels using magnetic resonance imaging

April 9, 2020
Author(s)
Samuel D. Oberdick, Stephen E. Russek, Megan E. Poorman, Gary Zabow
… We show that magnetic resonance imaging (MRI) can be used to visualize the … during in situ coprecipitation. The synthesis creates a magnetic nanoparticle loaded polymer gel, or magnetogel. … network. The creation of iron oxide particles changes the magnetic properties of the gel, allowing the synthesis to be …

Magnetic Structure and Exchange Interactions in Quasi-One-Dimensional MnCl 2 (urea) 2

December 11, 2015
Author(s)
Jamie L. Manson, Qingzhen Huang, Craig Brown, Jeffrey W. Lynn, Matthew B. Stone, John Singleton, Fan Xiao
… and O¿¿¿H-N type link the chains into a quasi-3D network. Magnetic susceptibility data reveal a broad maximum at 9 K that is consistent with short-range magnetic order. Pulsed-field magnetization measurements … conducted at 0.6 K show that a fully polarized magnetic state is achieved at Bsat = 19.6 T with a …

Magnetic Order and Fluctuations in the Presence of Quenched Disorder in the Kagome Staircase System (Co 1-x Mg x ) 3 V 2 O 8

November 21, 2012
Author(s)
K. Fritsch, Zahra Yamani, S. Chang, Yiming Qiu, John R. Copley, M. Ramazanoglu, H. A. Dabkowska, B. D. Gaulin
… Co 3 V 2 O 8 is an orthorhombic magnet in which S=3/2} magnetic moments reside on two crystallographically … kagome lattice, the stacked kagome staircase. The magnetic interactions between the Co 2+ moments in this structure lead to a complex magnetic phase diagram at low temperature, wherein it …

The Electric And Magnetic Susceptibilities Of Gaseos Oxygen: Comparisons Of New Measurements and Modern Theory

September 25, 2008
Author(s)
Michael R. Moldover, E May, James W. Schmidt
… determine oxygen's frequency-dependent, relative magnetic permeability, υ r (f, p, T), with an uncertainty of … that are, in principle, amenable to calculation: the molar magnetic susceptibility in the limits of zero-pressure and … χ meas,M000 =χ M (0,0,293.15 K), and the second magnetic virial coefficient, b υ . With oxygen's electronic …
Displaying 276 - 300 of 3361
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