Phenomenological model for size-dependent switching behavior in spin transfer torque devices

2:30 PM–5:30 PM, Monday, March 10, 2008
Morial Convention Center Room: 225

Sponsoring Units: GMAG DMP FIAP
Chair: Bill Rippard, National Institute of Standards and Technology, Boulder

Abstract ID: BAPS.2008.MAR.D32.7

Abstract: D32.00007 : Phenomenological model for size-dependent switching behavior in spin transfer torque devices

4:06 PM–4:18 PM

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Authors:

Venkatesh Chembrolu
(Department of Applied Physics, Stanford University, Stanford, California 94305, USA)

Yves Acremann
(PULSE Centre, Stanford Linear Accelerator Centre, Menlo Park, California 94025, USA)

John Paul Strachan
(Department of Applied Physics, Stanford University, Stanford, California 94305, USA)

Xiaowei Yu
(Department of Applied Physics, Stanford University, Stanford, California 94305, USA)

Ashwin Tulapurkar
(Stanford Synchrotron Radiation Laboratory, Menlo Park, California, 94025, USA)

Jordan Katine
(Hitachi Global Storage Technologies San Jose Research Center, San Jose, California 95120, USA)

Mathew Carey
(Hitachi Global Storage Technologies San Jose Research Center, San Jose, California 95120, USA)

Tolek Tyliszczak
(Advanced Light Source, Berkeley, California, 94720)

Joachim Stohr
(Stanford Synchrotron Radiation Laboratory, Menlo Park, California 94025, USA)

Recent results based on time resolved x-ray imaging of magnetization dynamics in nano-magnetic devices have shown size dependent trends in the switching behavior. Samples with a lateral dimension of 100x180nm show a vortex-driven switching mechanism, whereas smaller samples with a lateral dimension of 110x150nm do not switch by a vortex. Further studies have shown that when a non-zero angle in introduced between the fixed and the free layers, vortex-driven switching becomes manifest in samples with smaller dimensions also. Here, we would like to present a phenomenological model based on linearlized LLG equations to explain the various regimes of observed switching behaviors.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.MAR.D32.7

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Bulletin of the American Physical Society

2008 APS March Meeting

Volume 53, Number 2

Monday–Friday, March 10–14, 2008; New Orleans, Louisiana

Session D32: Focus Session: Spin Transfer Torque I

Abstract: D32.00007 : Phenomenological model for size-dependent switching behavior in spin transfer torque devices

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