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Stochastic Resonance in Magnetic Nan...

Cheng, Xiao.

Stochastic Resonance in Magnetic Nanostructures.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Stochastic Resonance in Magnetic Nanostructures.
Author:	Cheng, Xiao.
Description:	132 p.
Notes:	Source: Dissertation Abstracts International, Volume: 72-04, Section: B, page: 1924.
Notes:	Adviser: Ilya Krivorotov.
Contained By:	Dissertation Abstracts International72-04B.
Subject:	Nanoscience.
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3440039
ISBN:	9781124462967

Stochastic Resonance in Magnetic Nanostructures.
Cheng, Xiao.

Stochastic Resonance in Magnetic Nanostructures. - 132 p.

Source: Dissertation Abstracts International, Volume: 72-04, Section: B, page: 1924.

Thesis (Ph.D.)--University of California, Irvine, 2011.

This dissertation reports the observation of unusual types of microwave-frequency nonlinear magnetization dynamics co-excited by alternating spin transfer torque and thermal fluctuations. In these dynamics, temperature strongly enhances the amplitude of GHz-range precession of magnetization and enables excitation of nonlinear dynamical states of magnetization by weak alternating spin transfer torque. These thermally activated dynamics are explained in terms of non-adiabatic stochastic resonance of magnetization driven by spin transfer torque.

ISBN: 9781124462967Subjects--Topical Terms:

220425
Nanoscience.

Stochastic Resonance in Magnetic Nanostructures.
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040 $a UMI $c UMI
100 1 $a Cheng, Xiao. $3 603123
245 1 0 $a Stochastic Resonance in Magnetic Nanostructures.
300 $a 132 p.
500 $a Source: Dissertation Abstracts International, Volume: 72-04, Section: B, page: 1924.
500 $a Adviser: Ilya Krivorotov.
502 $a Thesis (Ph.D.)--University of California, Irvine, 2011.
520 $a This dissertation reports the observation of unusual types of microwave-frequency nonlinear magnetization dynamics co-excited by alternating spin transfer torque and thermal fluctuations. In these dynamics, temperature strongly enhances the amplitude of GHz-range precession of magnetization and enables excitation of nonlinear dynamical states of magnetization by weak alternating spin transfer torque. These thermally activated dynamics are explained in terms of non-adiabatic stochastic resonance of magnetization driven by spin transfer torque.
520 $a This dissertation also shows that this new type of magnetic stochastic resonance is observed in both nano-scale spin valves and MgO-based magnetic tunnel junctions. It is described that a nano-scale magnetic tunnel junction utilizing a nonlinear magnetic resonance excited by spin transfer torque can achieve intrinsic detector sensitivity of 360 mV/muW. In magnetic tunnel junctions, the maximum sensitivity achieved is larger than that of conventional semiconductor Schottky diodes. It is proposed that stochastic resonance in nanomagnets provides a promising potential for application in magnetic field sensors and microwave signal detectors of nano-scale dimensions.
590 $a School code: 0030.
650 4 $a Nanoscience. $3 220425
650 4 $a Physics, Condensed Matter. $3 226939
650 4 $a Biology, Molecular. $3 226919
690 $a 0307
690 $a 0565
690 $a 0611
710 2 $a University of California, Irvine. $b Physics - Ph.D. $3 603124
773 0 $t Dissertation Abstracts International $g 72-04B.
790 1 0 $a Krivorotov, Ilya, $e advisor
790 1 0 $a Mills, Douglas $e committee member
790 1 0 $a Collins, Philip $e committee member
790 $a 0030
791 $a Ph.D.
792 $a 2011
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3440039