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Applied Physics Letters / Volume 100 / Issue 4 / MAGNETICS AND SPINTRONICS

Appl. Phys. Lett. 100, 042408 (2012); http://dx.doi.org/10.1063/1.3680091 (3 pages)

Temperature dependence of microwave voltage emission associated to spin-transfer induced vortex oscillation in magnetic tunnel junction

P. Bortolotti1, A. Dussaux1, J. Grollier1, V. Cros1, A. Fukushima2, H. Kubota2, K. Yakushiji2, S. Yuasa2, K. Ando2, and A. Fert1

1Unité Mixte de Physique CNRS/Thales and Université Paris Sud 11, 1 av. Fresnel, 91767 Palaiseau, France
2National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan

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(Received 12 December 2011; accepted 6 January 2012; published online 27 January 2012)

The temperature dependence of a vortex-based nano-oscillator induced by spin transfer torque (STVO) in magnetic tunnel junctions (MTJ) is considered. We obtain emitted signals with large output power and good signal coherence. Due to the reduced non-linearities compared to the uniform magnetization case, we first observe a linear decrease of linewidth with decreasing temperature. However, this expected behavior no longer applies at lower temperature and a bottom limit of the linewidth is measured.

© 2012 American Institute of Physics

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KEYWORDS, PACS, and IPC

Keywords

magnetic tunnelling, magnetisation, spectral line breadth

PACS

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

  • 75.47.-m

    Magnetotransport phenomena; materials for magnetotransport

  • 75.70.Cn

    Magnetic properties of interfaces (multilayers, superlattices, heterostructures)

International Patent Classification (IPC)

  • H01F13/00

    Apparatus or processes for magnetising or demagnetising

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3680091

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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