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Displaying 751 - 775 of 3361

Micro-engineered local field control for high-sensitivity multi-spectral MRI

June 19, 2008
Author(s)
Gary Zabow, Stephen Dodd, John M. Moreland, Alan P. Koretsky
In recent years, biotechnology and biomedical research have benefited from the introduction of a variety of specialized nanoparticles whose well-defined, optically distinguishable signatures enable simultaneous tracking of numerous biological indicators

Cobalt Ferrite Nanoparticle Intercalated Carbon Nanotubes for a Nanomagnetic Ultrasensitive Sensor for Cr-VI in Water

June 24, 2020
Author(s)
Tassew Mekuria, Syed Khalid, Kathryn L. Krycka, Markus Bleuel, Himanshu Verma, Haiping Hong, Shashi P. Karna, Dereje Seifu
Nanocomposites of cobalt ferrite (CFO) magnetic nanoparticles intercalated on carbon nanotubes (CNTs) are evaluated as a nanomagnetic ultrasensitive sensor for the environmental toxin, hexavalent chromium (Cr-VI). Specifically, the structural and magnetic

400-Fold Reduction in Saturation Field by Interlayering

January 13, 2009
Author(s)
William F. Egelhoff Jr., John E. Bonevich, Philip Pong, John Unguris, Robert D. McMichael, Gery R. Stafford, Carlos R. Beauchamp
The buildup of stress with increasing thickness of magnetic thin films is a common phenomenon that often induces undesirable saturation fields that can convert an otherwise magnetically soft film into a magnetically hard one. We have found that by

Strain-programmable van der Waals magnetic tunnel junctions

June 3, 2025
Author(s)
John Cenker, Dmitry Ovchinnikov, Harvey Yang, Daniel Chica, Catherine Zhu, Jiaqi Cai, Geoffrey Diederich, Zhaoyu Liu (liuzhaoyu), Xiaoyang Zhu, Xavier Roy, Ting Cao, Matthew Daniels, Jiun-Haw Chu, Di Xiao, Xiaodong Xu
… Magnetic tunnel junctions (MTJs) are foundational spintronics devices with applications ranging from stable magnetic memory to emerging stochastic computing schemes. … tunneling magnetoresistance ratio without an external magnetic field. In addition to the purely FM and AFM states, …

Structural and magnetic phase diagram of CeFeAsO1- xFx and its relation to high-temperature superconductivity

October 26, 2008
Author(s)
Jun Zhao, Qingzhen Huang, Clarnia dela Cruz, Shiliang Li, Jeffrey Lynn, Ying Chen, Mark Green, G. F. Chen, Z. C. Li, J. L. Luo, N. L. Wang, Pengcheng Dai
… We use neutron scattering to study the structural and magnetic phase transitions in CeFeAsO1−xFx as the system is … neutron diffraction, magnetic order, structural phase transition, iron based … Structural and magnetic phase diagram of CeFeAsO1- xFx and its relation to …

Phase Transitions and Magnetocaloric Effect in Mn 3 Cu 0.89N d0.96^

August 1, 2014
Author(s)
Jun Yan, Ying Sun, Hui Wu, Qingzhen Huang, Cong Wang, Zaixing Shi, Sihao Deng, Kewen Shi, Huiqing Lu, Lihua Chu
We report the large magnetic entropy change observed in the antiperovskite Mn 3Cu 0.89N 0.96. Based in the heat flow peak measured by differential scanning calorimeter (DSC), the total entropy change according to the structural transition (tetragonal to

Physical Properties of the Ce 2 MAl 7 Ge 4 Heavy-Fermion Compounds (M = C0, Ir,Ni,Pd)

May 23, 2016
Author(s)
N. J. Ghimire, S. K. Cary, S. Eley, N. A. Wakeham, P. F. S. Rosa, T. Albrecht-Schmitt, Y. Lee, M. Janoschek, Craig Brown, L. Civale, J. D. Thompson, F. Ronning, E. D. Bauer
The synthesis, crystal structure and physical properties by means of single crystal x-ray diffraction, neutron powder diffraction, magnetic, thermal and transport measurements of the new heavy fermion compounds Ce 2M Al 7Ge 4(M = Co, Ir, Ni, Pd) are

Synthetic Magnetic Fields for Ultracold Neutral Atoms

December 3, 2009
Author(s)
Yu-Ju Lin, Robert L. Compton, Karina K. Jimenez Garcia, James V. Porto, Ian B. Spielman
… arises from the Lorentz force for charged particles in a magnetic field; among the most intriguing examples are the … quantum Hall states in 2D electron systems in strong magnetic fields. For neutral atomic gases, pioneering demonstrations of synthetic magnetic fields relied on the equivalence of the Lorentz …

Combining Electrically Detected Magnetic Resonance Techniques to Study Atomic-Scale Defects Generated by Hot-Carrier Stressing in HfO2/SiO2/Si Transistors

April 12, 2023
Author(s)
Stephen Moxim, James P Ashton, Mark Anders, Jason Ryan
… The defects are studied via electrically detected magnetic resonance (EDMR) through both spin-dependent charge … or more hafnium atoms. The use of electrically detected magnetic resonance (EDMR) techniques indicates that the … Electrically detected magnetic resonance, Electron spin resonance, Charge pumping, …

A microfabricated optically-pumped magnetic gradiometer

January 18, 2017
Author(s)
Abigail R. Perry, Sean P. Krzyzewski, John E. Kitching, S. Geller, Sheng D., Svenja A. Knappe
… We report on the development of a microfabricated atomic magnetic gradiometer based on optical spectroscopy of alkali … free regime. The sensor can measure differences in magnetic field over a 2 cm baseline of 10 fT/Hz^1/2 at frequencies above 20 Hz. The maximum rejection of magnetic field noise is 1000 at 10 Hz. By use of a set of …

Constraints on Proximity-Induced Ferromagnetism in a Dirac Semimetal (Cd3As2)/Ferromagnetic Semiconductor (Ga1-xMnxSb) Heterostructure

September 11, 2023
Author(s)
Arpita Mitra, Run Xiao, Wilson Yanez, Yongxi Ou, Juan Chamorro, Tyrel M. McQueen, Alexander Grutter, Julie A. Borchers, Michael R. Fitzsimmons, Timothy Charlton, Nitin Samarth
Breaking time-reversal symmetry in a Dirac semimetal Cd3As2 through doping with magnetic ions or by the magnetic proximity effect is expected to cause a transition to other topological phases (such as a Weyl semimetal). To this end, we investigate the

Precessional switching in submicrometer spin valves

April 22, 2002
Author(s)
Shehzaad F. Kaka, Stephen E. Russek
Small spin valves are switched using a subnanosecond field pulse applied alongdg the magnetization hard-axis fields increases as the duration is decreased from 325 to 230 ps. This indicates a large-angle precessional motion in response to the transverse

Normal Mode Mixing and Ferromagnetic Resonance Linewidth

September 1, 2002
Author(s)
A B. Kunz, Robert D. McMichael
This spin wave modes for a uniform film are perturbed by the inclusion of inhomogeneities into the system. The resulting perturbed Hamiltonianis diagonalized to create a new set of spin waves modes. The effect of the strength of the perturbations is

Comment on "Magnetic Structure of Gd 2 Ti 2 O^d7"

March 27, 2012
Author(s)
J. R. Stewart, G. Ehlers, A. S. Wills, S.T. Bramwell, Jason S. Gardner
… B, 83 054422 (2011)] recently proposed solutions to the magnetic structure of gadolinium titanate that differ to … data. Long and collegues were led to reconsider the magnetic structure of gadolinium titanate on the basis of a … and conclude there is no reason to doubt our published magnetic structures. …

New Magnetic Phases of bcc-Co Thin Films

January 1, 2005
Author(s)
T Monchesky, John Unguris
… We have been able to observe two new magnetic phases of ultrathin Co by growing atomically well … For thicknesses greater than 4.1 ML, we find a new magnetic phase of bcc Co with an easy axis along the … the [001] direction. The new bcc-Co phase provides a new magnetic structure for potential spintronics applications. …

Iron and Permalloy Based Magnetic Monolithic Tunable Microwave Devices

May 15, 2003
Author(s)
Bijoy Kuanr, Leszek Malkinski, Robert E. Camley, Zbigniew Celinski, Pavel Kabos
… We constructed a series of Magnetic Monolithic tunable Microwave notch-filters and phase … geometry on GaAs substrates using Fe and Permalloy as magnetic materials. In contrast to previous work with … Fe based CPW filters shifted from 9.3 GHz at zero applied magnetic field to 15 GHz for a magnetic field as low as 0.9 …

Surface Magnetization of Ferromagnetic Ni(110): A Polarized LEED Experiment

September 3, 1979
Author(s)
Robert Celotta, Daniel T. Pierce, G Wang, S Bader, G P. Felcher
… (hysteresis curve) and the temperature dependence of the magnetization at a Ni(110) surface was measured by polarized … a few percent. The temperature dependence of the surface magnetization measured in the range 0.5 … Surface Magnetization of Ferromagnetic Ni(110): A Polarized LEED …
Displaying 751 - 775 of 3361
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