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Displaying 176 - 200 of 3361

3:1 Magnetization Plateau and Suppression of Ferroelectric Polarization in an Ising Chain Multiferroic

January 26, 2009
Author(s)
Y.-J. Jo, Seoungsu Lee, E. Choi, H. Yi, William D. Ratcliff, Y. Choi, V. Kiryukhin, S.-W. Cheong, L. Balicas
… (x≃0.96) was studied in magnetic fields of up to 33 T. Magnetization and neutron-scattering measurements reveal … ↑↑↓↓ spin configuration to the ↑↑↑↓ state with a broad magnetization plateau, and then to the ↑↑↑↑ state. The … 3:1 Magnetization Plateau and Suppression of Ferroelectric …

Room Temperature Active Regenerative Magnetic Refrigeration: Magnetic Nanocomposites

May 15, 2003
Author(s)
F Shir, L Yanik, Lawrence H. Bennett, Edward Della Torre, Robert D. Shull
… compared to the other common methods of assembling a magnetic refrigeration bed, such as a layered arrangement of the thermal bed or mixing of different magnetic materials. This article discusses the thermodynamics … and heat transfer analysis of an ideal and real active magnetic regenerative refrigeration cycle. An algorithm for …

Micromachined Silicon Torsional Resonator for Magnetic Anisotropy Measurement

November 1, 1998
Author(s)
J. Morillo, Q. Su, B. Panchapakesan, Matthias Wuttig, Donald B. Novotny
… A novel method for measuring the out-of-plane magnetic anisotropy of thin films has been developed using … which is commonly used to measure the perpendicular magnetic anisotropy energy constant, K u , is modified into a … resonator, the experimental procedure for measuring magnetic anisotropy and results. The theoretical values of K …

Field Dependence of the Barrier to Magnetization Reversal of a Stoner-Wohlfarth Particle

January 2, 2006
Author(s)
Edward Della Torre, Lawrence H. Bennett, G Kahler, Roland deWit, R E. Watson
… The energy barrier for magnetization reversal, E(sub B), varies quadratically with … Nonetheless, the energy (enthalpy) required to reverse the magnetization involves E(sub B) plus the work associated with … barrier, enthalpy barrier, magnetic field dependence, magnetization reversal, Stoner-Wohlfarth particle …

Low Magnetic Moment PIN Diodes for High Field MRI Surface Coils

November 8, 2006
Author(s)
Pavel Voskoboynik, Ronald D. Joos, W E. Doherty, Ronald B. Goldfarb
… (PIN) silicon diodes are commonly used in magnetic resonance imaging (MRI) coils to perform active or … circuit functions. However, diode packages with large magnetic moments are known to cause image artifacts in high … field MRI systems. In this study, diode packages with low magnetic moment were designed by compensating components of …

Ralaxometry and Magnetometry of Ferritin

December 1, 1998
Author(s)
R A. Brooks, J Vymazal, Ronald B. Goldfarb, J W. Bulte, P Aisen
By combining nuclear magnetic ralaxometry on 39 ferritin samples with different iron loading with magnetometry, results were obtained that suggest a new interpretation of the core structure and magnetic properties of ferritin. These studies provide

International comparison of measurements of hard magnets with the Vibrating Sample Magnetometer

August 1, 2014
Author(s)
F. Fiorillo, C. Beatrice, D. Son, Franz Josef Ahlers, R. Groessinger, F. Albertini, Y. P. Liu, A Lin, E. Patroi, Robert D. Shull, O. Thomas
… comparison regarding the magnetic properties of hard magnets, measured using the Vibrating Sample Magnetometer. … Magnetic measurements, Vibrating Sample Magnetometer, Hard magnets, Measuring uncertainty … International comparison of measurements of hard magnets with the Vibrating Sample Magnetometer …

Dynamic Lorentz Microscopy of Micromagnetic Structure in Magnetic Tunnel Junctions

November 20, 2006
Author(s)
Justin Shaw, R.H. Geiss, Stephen E. Russek
… the micromagnetic structure and magnetization reversal in magnetic tunnel junctions (MTJs) fabricated with different … considerably more disorder than that seen in an isolated magnetic layer. The disorder changes with anneals that set … The disorder and time-dependent fluctuations in the magnetic structure provide a foundation for understanding …

Origin and Reduction of 1=f Magnetic Flux Noise in Superconducting Devices

October 18, 2016
Author(s)
P Kumar, David P. Pappas, Robert Mcdermott, J.W. Freeland, Clare Yu, M Beck, Hui Wang, Ruqian Wu
… Magnetic flux noise is a dominant source of dephasing and … Recent work indicates that the noise is from unpaired magnetic defects on the surfaces of the superconducting … more than an order of magnitude and a suppression of 1=f magnetic flux noise power spectral density of up to a factor …

Molecular Quantum Magnetism in LiZn 2 Mo 3 O 8

January 15, 2014
Author(s)
M. Mourigal, W. T. Fuhrman, J. P. Sheckelton, A. Wartelle, Jose Rodriguez Rivera, D. L. Abernathy, T. M. McQueen, Collin L. Broholm
… Magnetism, spin liquids, Magnetic ordering … Molecular Quantum Magnetism in LiZn 2 Mo 3 O 8 …

Magnetic Reversal of Ultra-Thin Films with Planar Magnetization

August 25, 1999
Author(s)
R Hyman, A Zangwill, Mark D. Stiles
… Classical spin simulations are used to study magnetic reversal in ultra-thin (1-6 monolayers) films with planar magnetization and surface roughness typical of epitaxially … anisotropy, coercivity, hysteresis, magnetization reversal, surface roughness … Magnetic Reversal of Ultra-Thin Films with Planar …

Magneto-Optical Measurements of Co-Pt (111) Multilayers

January 1, 1999
Author(s)
R A. Fry, Lawrence H. Bennett, Edward Della Torre, Robert D. Shull, William F. Egelhoff Jr., R F. Farrow, C H. Lee
An automated magneto-optical Kerr effect (MOKE) magnetometer was used to measure the polar Kerr rotation and ellipticity loops of multilayers with X = 0.3 nm to 1.2 nm. For most of the samples studies, the hysteresis loops exhibit typical perpendicular

Fabrication and Domain Imaging of Iron Magnetic Nanowire Arrays

May 1, 1998
Author(s)
D Tulchinsky, Michael H. Kelley, Jabez J. McClelland, R Gupta, Robert Celotta
… Arrays of magnetic nanowires are fabricated by using a corrugated … 213nm, and having aspect ratios of 1:1500. Images of the magnetic domain structures of these nanowires are obtained by … magnetic nanowires … Fabrication and Domain Imaging of Iron Magnetic Nanowire Arrays …

Interface-Induced Superconductivity in Magnetic Topological Insulators

February 9, 2024
Author(s)
Hemian Yi, Yi-Fan Zhao, Ying-Ting Chan, Jiaqi Cai, Ruobing Mei, Xianxin Wu, Zi-Jie Yan, Ling-Jie Zhou, Ruoxi Zhang, Zihao Wang, Stephen Paolini, Run Xiao, Ke Wang, Anthoney Richardella, John Singleton, Laurel Winter, Thomas Prokscha, Zaher Salman, Andreas Suter, Purnima Balakrishnan, Alexander Grutter, Moses Chan, Nitin Samarth, Xiaodong Xu, Weida Wu, Chao-Xing Liu, Cui-Zu Chang
… heterostructures formed by stacking together two magnetic materials, a ferromagnetic topological insulator … ferromagnetism, and topological band structure in the magnetic TI layer—the three essential ingredients of chiral … superconductivity is accompanied by a high upper critical magnetic field that exceeds the Pauli paramagnetic limit for …

Complex Three-Dimensional Magnetic Ordering in Segmented Nanowire Arrays

July 12, 2017
Author(s)
Alexander J Grutter, Kathryn Krycka, Elena V. Tartakovskaya, Julie A. Borchers, K. Sai Madhukar Reddy, Eduardo Ortega, Arturo Ponce, Bethanie J. H. Stadler
… The first comprehensive three-dimensional picture of magnetic ordering in high-density arrays of segmented FeGa/Cu … between segments within individual wires. The resulting magnetic structure for our nanowire sample in a low field is … and resulting stability windows for a variety of ordered magnetic structures. These results provide a roadmap for …

Non-magnetic ion site disorder effects on the quantum magnetism of a spin-1/2 equilateral triangular lattice antiferromagnet

March 10, 2022
Author(s)
Qing Huang, R. Rawl, W. W. Xie, E. S. Chou, V. S. Zapf, X. X. Ding, C. Mauws, C. R. Wiebe, E. X. Feng, H. B. Cao, W. Tian, J. Ma, Yiming Qiu, Nicholas Butch, H. D. Zhou
… With the motivation to study how non-magnetic ion site disorder affects the quantum magnetism of Ba3CoSb2O9, a spin-1/2 equilateral triangular … samples of Ba2.87Sr0.13CoSb2O9 with Sr doping on non-magnetic Ba2+ ion sites. The results show that … quantum magnetism, site disorder effect, neutron scattering …

Evolution of the Commensurate and Incommensurate Magnetic phases of the S{/I= {3/2} Kagome Staircase Co 3 V 2 O 8 in a Applied Field

December 8, 2011
Author(s)
Joel Helton, Georgii L. Bychkov, Sergei N. Barilo, Nyrissa Rogado, Robert J. Cava, Jeffrey W. Lynn
… S = {3/2} kagome staircase compound Co 3 V 2 O 8 with a magnetic field applied along the magnetization easy-axis (H … et al., Phys. Rev. B 74, 014430 (2006)] reported a rich magnetic phase diagram, with a ferromagnetic ground state as … with multiple commensurate lock-in transitions. The magnetic phase diagram with H || a adds further complexity. …

Magnetic Order of the Hexagonal Rare Earth Manganite Dy 0.5 Y 0.5 MnO 3

August 26, 2011
Author(s)
Joel Helton, Deepak Singh, Harikrishnan S. Nair, Suja Elizabeth
… with neutron diffraction measurements. Below 2.4 K magnetic order is observed on both the Mn (antiferromagnetic) … undiluted (h)DyMnO 3 or other (h)RMnO6d3^ materials with a magnetic R ion. A magnetic field applied parallel to the crystallographic … magnetic order, multiferroics, magnetic neutron diffraction …

Topological Control of Magnetic Textures

February 25, 2021
Author(s)
Hanu Arava, Frank P. Barrows, Mark D. Stiles, Amanda K. Petford-Long
… out on the role of using topology to stabilize different magnetic textures, such as a vortex or an anti-vortex state, in a magnetic heterostructure consisting of a Permalloy disk … Finally, we provide preliminary experimental evidence from magnetic force microscopy studies in which we demonstrate …

The irony of the magnet system for Kibble balances -- a review

March 1, 2022
Author(s)
Stephan Schlamminger, Shisong Lo
… The magnet system is an essential component in the Kibble … Nevertheless, care must be taken to design and build the magnet system because the cancellation is perfect if the $Bl$ … assessment of systematic uncertainties associated with the magnet system. … Magnet system, Kibble balance, primary realization of mass …

Ferromagnetic resonance measurements of (Co/Ni/Co/Pt) multilayers with perpendicular magnetic anisotropy

August 20, 2016
Author(s)
R R Sbiaa, Justin Shaw, Hans Nembach, M Al Bahri, M Ranjbar, J. ?kerman, S. N. Piramanayagam
… were investigated for possible use as a free layer in magnetic tunnel junctions and spintronics devices. The … was varied from 0.3 nm to 0.9 nm and the resulting magnetic properties were compared with (Co/Ni) and (Co/Pt) multilayers. As determined from magnetic force microscopy, magnetometry and ferromagnetic …

Pulse Tube Cryocooler for Rapid Cooldown of A Superconducting Magnet

June 9, 2008
Author(s)
Michael A. Lewis, Ryan P. Taylor, Peter E. Bradley, Isaac Garaway, Ray Radebaugh
… rapid cooldown of a high temperature superconducting (HTS) magnet that is part of a gyrotron required for the generation … with a 20 kg copper mass attached, which simulates a HTS magnet, are compared and discussed. … Tube Cryocooler for Rapid Cooldown of a Superconducting Magnet …

Spin-Current Induced Magnetotransport in Co/Cu/Co Nanostructures

September 1, 2002
Author(s)
Fred B. Mancoff, Stephen E. Russek
We report measurements on sub-100 nm current-perpendicular-to-place Co/Cu/Co spin-valves. The giant magnetoresistance versus applied magnetic field shows the switching in individual patterned Co nanomagnets. Spin transfer from the spin-polarized current to
Displaying 176 - 200 of 3361
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