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Ami E. Berkowitz
Researcher at University of California, San Diego
Publications - 232
Citations - 16347
Ami E. Berkowitz is an academic researcher from University of California, San Diego. The author has contributed to research in topics: Magnetization & Magnetoresistance. The author has an hindex of 55, co-authored 232 publications receiving 15795 citations. Previous affiliations of Ami E. Berkowitz include General Electric & University of California, Los Angeles.
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Journal ArticleDOI
Giant magnetoresistance in heterogeneous Cu-Co alloys.
Ami E. Berkowitz,J. R. Mitchell,Matthew J. Carey,A. P. Young,Shufeng Zhang,Frederick E. Spada,F. T. Parker,Andreas Hütten,G. Thomas +8 more
TL;DR: Giant magnetoresistance in heterogeneous thin film Cu-Co alloys consisting of ultrafine Co-rich precipitate particles in a Cu-rich matrix is observed, modeled by including spin-dependent scattering at the interfaces between the particles and the matrix, as well as the spin- dependent scattering in the Co- rich particles.
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Surface Spin Disorder in NiFe2O4 Nanoparticles.
TL;DR: In this paper, a model of the magnetization within these particles consisting of ferrimagnetically aligned core spins and a spin-glass-like surface layer is proposed, and the qualitative features of this model are reproduced by a numerical calculation of the spin distribution.
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Exchange anisotropy — a review
Ami E. Berkowitz,Kentaro Takano +1 more
TL;DR: In this article, the unidirectional anisotropy of a ferromagnetic bilayer coupled to an antiferromagnetic film was studied. But the authors focused on the unideal anismotropy produced by the exchange bias field produced by a metal and an oxide bilayer.
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Finite Size Effects in Antiferromagnetic NiO Nanoparticles
TL;DR: In this article, a model of spin configurations in NiO nanoparticles yields 8-, 6-, or 4-sublattice configurations, indicating a new finite size effect, in which the reduced coordination of surface spins causes a fundamental change in the magnetic order throughout the particle.
Journal ArticleDOI
Giant magnetic field dependent impedance of amorphous fecosib wire
Robert Beach,Ami E. Berkowitz +1 more
TL;DR: In this paper, the frequency-dependent resistance of an amorphous Fe4.3Co68.2Si12.5B15 wire was analyzed and it was shown that the frequency response of both the resistance and reactance is almost entirely suppressed by an axial magnetic field HA <150 Oe, resulting in a typical magnetoresistance for frequencies f < 1 MHz of the order of the dc wire resistance.