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Search Publications

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Displaying 601 - 625 of 3361

Micromechanical Torque Magnetometer for In Situ Thin-film Measurements

July 1, 2001
Author(s)
John M. Moreland, Albrecht Jander, James A. Beall, Pavel Kabos, Stephen E. Russek
We describe a new type of magnetometer based on a microelectromechanical system (MEMS) for in situ monitoring of magnetic film moment during the film deposition process. The magnetometer measured mechanical torque on a film as it is deposited onto a

Relaxation Times for Magnetization Reversal in a High Coercivity Magnetic Thin Film

March 17, 1999
Author(s)
Thomas J. Silva, Anthony B. Kos, N D. Rizzo
… a magneto-optical Kerr effect microscope to measure 180° magnetization reversal in a high coercivity CoCr10Ta4 thin … film subjected to nanosecond field pulses. Exponential magnetization decay occurs for pulse duration tp10 ns, indicating a crossover from nonequilibrium magnetization relaxation at short tp to metastable …

Logic circuit prototypes for three-terminal magnetic tunnel junctions with mobile domain walls

January 12, 2016
Author(s)
Jean Anne Currivan-Incorvia, S. Siddiqui, S. Dutta, Eric R. Evarts, J. Zhang, D. Bono, C A. Ross, M. A. Baldo
… logic device that encode information in the position of a magnetic domain wall in a ferromagnetic wire. We show that a … three inverters. This prototype demonstration shows that magnetic domain wall logic devices have the necessary … logic, circuit, domain wall, three terminal, magnetic tunnel junction, prototypes, ferromagnetic wire …

Magnetic Behavior of Atomically Engineered NiO-Co-Cu-based Giant Magnetoresistance Spin Valves Pb as a Surface Modifier

August 1, 2000
Author(s)
H D. Chopra, E J. Repetski, H J. Brown, P J. Chen, L Swartzendruber, William F. Egelhoff Jr.
… film morphology in order to control physical properties in magnetic multilayers. In particular, the magnetic properties of giant magnetoresistive NiO-Co-Cu-based … of the symmetric spin valve leads to a reduced in-plane magnetic anisotropy and coupling. In the presence of Pb, the …

Detection of Pinholes in Magnetic Tunnel Junctions by Magnetic Coupling

October 16, 2008
Author(s)
Philip Pong, Cindi L. Dennis, Audie M. Castillo, Andrew P. Chen, William F. Egelhoff Jr.
… in tunnel barriers are detrimental to the performance of magnetic tunnel junctions (MTJ) since they create direct magnetic exchange coupling between the free and pinned magnetic films and may act as current short circuits. A … Detection of Pinholes in Magnetic Tunnel Junctions by Magnetic Coupling …

Miniature atomic magnetometer integrated with flux concentrators

January 14, 2009
Author(s)
William C. Griffith, Svenja A. Knappe, John E. Kitching, Ricardo Jimenez Martinez, Vishal Shah
High permeability magnetic flux concentrators are used to enhance the sensitivity of an atomic magnetometer operating in the spin exchange relaxation free regime. The magnetometer uses a millimeter scale 87Rb vapor cell and either mu-metal or Mn-Zn ferrite

A System for the Study of Magnetic Materials and Magnetic Imaging with the STM

January 1, 1991
Author(s)
P First, Joseph A. Stroscio, Daniel T. Pierce, Robert A. Dragoset, Robert Celotta
… as well as to prepare and characterize thin films of magnetic materials by conventional means, including STM. This … A System for the Study of Magnetic Materials and Magnetic Imaging with the STM …

In-situ Polarized 3He system for the Magnetism Reflectometer at the Spallation Neutron Source

July 2, 2012
Author(s)
Thomas R. Gentile, X Tong, C Y. Jiang, V Lauter, H. Ambaye, D. Brown, L Crow, R J. Goyette, W-T Lee, A. Parizzi
… polarization analyzer developed for the time-of-flight Magnetism Reflectometer (MAGICS) at the Spallation Neutron … Magnetism Reflectometer, unpolarized neutrons, time-of-flight … In-situ Polarized 3He system for the Magnetism Reflectometer at the Spallation Neutron Source …

High-Field Magnetization and Magnetic Phase Diagram of a-Cu 2 V 2 O 7

June 16, 2017
Author(s)
G. Gitgeatpong, M. Suewattana, Shiwei Zhang, A. Miyake, M. Tokunaga, P. Chanlert, N. Kurita, H. Tanaka, T. J. Sato, Yang Zhao, K. Matan
… High-field magnetization of the spin-1/2 antiferromagnet α-Cu 2 V 2 O 7 was measured in pulsed magnetic fields of up to 56 T in order to study its magnetic phase diagram. When the field was applied along the … High-Field Magnetization and Magnetic Phase Diagram of a-Cu 2 V 2 O 7 …

Dynamic Analysis of Sliding Contacts at Head-Disk Interface

October 1, 2002
Author(s)
Tze J. Chuang, Stephen M. Hsu
As magnetic data storage technology moves towards higher areal data density with higher rotational speeds and lower flying heights, the propensity of severe sliding contacts at the head-disk interface is bound to increase. The tribological performance of

Properties of magnetic barrier structures for superconducting-magnetic hybrid Josephson junctions

July 7, 2013
Author(s)
Burm Baek, Samuel P. Benz, William H. Rippard, Stephen E. Russek, Paul D. Dresselhaus, Horst Rogalla, Matthew R. Pufall
… materials composed of both pseudo-spin valves (PSV) and magnetic-clusters. Our choice of relatively weak … with these materials exhibit Josephson coupling as well as magnetic switching behavior. The differences in switching … the critical current is strongly modulated by the magnetic state in the barrier, including magnetic hysteresis. …

Growth-Induced In-Plane Uniaxial Anisotropy V 2 O 3 /Ni Films

October 18, 2017
Author(s)
Dustin Allen Gilbert, Juan Gabriel Ramirez, T. Saerbeck, J. Trastoy, Ivan K. Schuller, Kai Liu, J. de la Venta
We report a microstructure-induced uniaxial anisotropy in V 2O 3/Ni hybrid thin films obtained from temperature and angular dependence of the magnetization. X-ray diffraction and reciprocal space maps identify the in-plane crystalline axes of the V 2O 3

Cone-Spiral Magnetic Ordering Dominated Lattice Distortion and Giant Negative Thermal Expansion in Fe-Doped MnNiGe Compounds

March 1, 2020
Author(s)
Feiran Shen, Houbo Zhou, Fengxia Hu, Jian-Tao Wang, Sihao Deng, Baotian Wang, Hui Wu, Qingzhen Huang, Jing Wang, Jie Chen, Lunhua He, Jiazheng Hao, Zibing Yu, Feixiang Liang, Tianjiao Liang, Jirong Sun, Baogen Shen
… the NTE behavior involving lattice distortion dominated by magnetic structure in hexagonal MnM'Ge-based (M': Ni, Co) … the Fe-doped MnNiGe shows an incommensurate cone-spiral magnetic ordering, and the lattice distortion during phase … Magnetic order, negative thermal expansion, neutron …

Physical Properties of the Quasi-Two-Dimensional Square Lattice Antiferromagnet Ba 2 FeSi 2 O 7

December 28, 2021
Author(s)
Tae-Hwan Jang, Seung-Hwan Do, Minseong Lee, Hui Wu, Craig Brown, Andrew D. Christianson, Sang-Wook Cheong, Jae-Hoon Park
We report magnetization (χ, M), magnetic specific heat (CM), and neutron powder diffraction results on a quasi-two-dimensional (2D) S = 2 square lattice antiferromagnet Ba 2FeSi 2O 7 consisting of FeO 4 tetrahedrons with highly compressive tetragonal

Absence of Magnetic Ordering in the Spin Liquid Candidate Ca 3 Cu 2 GeV 2 O 12

December 27, 2019
Author(s)
Joey A. Lussier, Brooke N. Richtik, Cole Mauws, Jeffrey W. Lynn, Chris R. Wiebe
… is known to occur. Heat capacity has shown a lack of magnetic ordering down to 0.35 K, confirmed with low … Spin Liquid, Exchange Frustration, Absence of Magnetic Order, Cubic garnet … Absence of Magnetic Ordering in the Spin Liquid Candidate Ca 3 Cu 2 GeV …

Magnetic Tunnel Junctions Fabricated Using Ion Neutralization Energy as a Tool

July 25, 2011
Author(s)
Joshua M. Pomeroy, Holger Grube, Pei-Ling Sun, Yun-Che Wang, Russell E. Lake
… processing step to modify the electrical properties of magnetic tunnel junctions (MTJs), providing an additional … Highly Charged Ions, Magnetic tunnel junctions, Ion-solid interactions … Magnetic Tunnel Junctions Fabricated Using Ion Neutralization …

Analysis of the Noise Spectra from Oxidized Superparamagnetic Nanoparticles

August 18, 2014
Author(s)
Solomon I. Woods, Snorri Ingvarsson, Shouheng Sun, John Kirtley
Expressions for the thermal noise from a collection of exchange-biased magnetic nanoparticles are derived and used to analyze the magnetic noise from thin films of partially oxidized nanoparticles. Functionalized Co nanoparticles with diameters between 3

Nuclear Magnetic Resonance Study of Anion and Cation Dynamics in CsSiH 3

March 31, 2019
Author(s)
R. V. Skoryunov, O. A. Babanova, A. V. Soloninin, A. V. Skripov, J.-N. Chotard, R. Janot, W. S. Tang, Mirjana NMN Dimitrievska, Terrence J. Udovic
… CsSiH 3 , we have measured the 1 H and 133 Cs nuclear magnetic resonance (NMR) spectra and spin-lattice relaxation … silanide, diffusion, energy storage materials, nuclear magnetic resonance … Nuclear Magnetic Resonance Study of Anion and Cation Dynamics in …

Magnetic Ground State and Magnetic Excitations in Black Dioptase Cu 6 Si 6 O 18

November 1, 2019
Author(s)
A. Podlesnyak, O. Prokhnenko, S. E. Nikitin, A. I. Kolesnikov, M. Matsuda, Sachith E. Dissanayake, Timothy R Prisk, H. Nojiri, I. F. Diaz-Ortega, L. M. Anovitz
… The low-temperature magnetic properties and magnetic structure of fully dehydrated black dioptase Cu 6 Si … neutron diffraction and magnetization measurements in magnetic fields up to 30 T. The intrachain J c and interchain … Magnetic Ground State and Magnetic Excitations in Black …

Mossbauer Study of NaCl-Coated Fe Nanoparticles

January 15, 1998
Author(s)
Alexander J. Shapiro, Robert D. Shull, N Gorshkov, Michael R. Zachariah
The potential use of magnetic nanoparticles as a very efficient refrigerant for magnetic refrigerators at temperatures well above 4.2 K was recently suggested [1,2]. Suitable for this purpose NaCl-coated iron nanoparticles were synthesized in a sodium
Displaying 601 - 625 of 3361
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