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Temperature dependence of magnetotransport properties of Ni80Fe20/Fe50Mn50/Ni80Fe20 trilayers
 

Summary: Temperature dependence of magnetotransport properties
of Ni80Fe20/Fe50Mn50/Ni80Fe20 trilayers
K. M. Chui, D. Tripathy, and A. O. Adeyeyea
Information Storage Materials Laboratory, Department of Electrical and Computer Engineering,
National University of Singapore, Singapore 117576, Singapore
Presented on 10 January 2007; received 16 October 2006; accepted 21 November 2006;
published online 16 April 2007
In this work, we have investigated the temperature dependence and effect of seed layer thickness on
the exchange bias of a Ni80Fe20 ts /Fe50Mn50 20 nm /Ni80Fe20 20 nm trilayer, with ts varied
systematically from 5 to 50 nm. Room temperature hysteresis loops show that variation in ts
strongly affects the exchange bias of both the seed and top Ni80Fe20 layers. Magnetotransport
measurements were used to determine the temperature dependence of the overall exchange field
HE and coercivity HC as a function of seed layer thickness. 2007 American Institute of
Physics. DOI: 10.1063/1.2709741
Exchange anisotropy at the interface of ferromagnetic
FM and antiferromagnetic AFM materials has been
known to show a shifted hysteresis loop, and sometimes with
an increase in the coercivity.1
The origin of exchange bias is
still not fully understood, but it is often attributed to the

  

Source: Adeyeye, Adekunle - Department of Electrical and Computer Engineering, National University of Singapore

 

Collections: Physics; Materials Science