한국자기학회

Retrieve | Search

Issues

Current Issue(Vol.21,No.4)

Volume 21(2016)

· No.1(pp.1-158) XML

· No.2(pp.159-302) XML

· No.3(pp.303-475) XML

· No.4(pp.476-665) XML

Volume 20(2015)

· No.1(pp.1-96) XML

· No.2(pp.92-200) XML

· No.3(pp.201-329) XML

· No.4(pp.331-465) XML

Volume 19(2014)

· No.1(pp.1-100) XML

· No.2(pp101-204) XML

· No.3(pp.205-313) XML

· No.4(pp.315-417) XML

Volume 18(2013)

· No. 1(pp1-79) XML

· No. 2(pp81-219) XML

· No. 3(pp221-374) XML

· No. 4(pp375-493) XML

Volume 17(2012)

· No.1(pp1-71) XML

· No.2(pp73-162) XML

· No.3(pp163-232) XML

· No.4(pp233-308) XML

Volume 16 (2011)

· No.1(pp1-82) XML

· No.2(pp83-195) XML

· No.3(pp197-321) XML

· No.4(pp323-465) XML

Volume 15 (2010)

· No.1(pp1-44) XML

· No.2(pp45-98) XML

· No.3(pp99-147) XML

· No.4(pp149-224) XML

Volume 14 (2009)

· No.1(pp.1-51)

· No.2(pp.53-100)

· No.3(pp.101-136)

· No.4(pp137-180) XML

Volume 13 (2008)

· No.1(pp.1-34)

· No.2(pp.37-80)

· No.3(pp.81-113)

· No.4(pp.115-181)

Volume 12 (2007)

· No.1(pp.1-52)

· No.2(pp.53-92)

· No.3(pp.93-132)

· No.4(pp.133-161)

Volume 11 (2006)

· No.1(pp.1-59)

· No.2(pp.61-102)

· No.3(pp.119-150)

· No.4(pp.151-207)

Volume 10 (2005)

· No.1(pp.1-39)

· No.2(pp.41-75)

· No.3(pp.77-132)

· No.4(pp.133-170)

Volume 9 (2004)

· No.1(pp.1-26)

· No.2(pp.27-68)

· No.3(pp.69-95)

· No.4(pp.97-127)

Volume 8 (2003)

· No.1(pp.1-78)

· No.2(pp.79-102)

· No.3(pp.103-127)

· No.4(pp.129-168)

Volume 7 (2002)

· No.1(pp.1-23)

· No.2(pp.25-59)

· No.3(pp.63-125)

· No.4(pp.127-164)

Volume 6 (2001)

· No.1(pp.1-41)

· No.2(pp.43-76)

· No.3(pp.77-107)

· No.4(pp.109-145)

Volume 5 (2000)

· No.1(pp.1-25)

· No.2(pp.27-71)

· No.3(pp.73-109)

· No.4(pp.111-143)

Volume 4 (1999)

· No.1(pp.1-37)

· No.2(pp.39-69)

· No.3(pp.73-106)

· No.4(pp.107-135)

Volume 3 (1998)

· No.1(pp.1-38)

· No.2(pp.35-66)

· No.3(pp.67-109)

· No.4(pp.111-156)

Volume 2 (1997)

· No.1(pp.1-33)

· No.2(pp.35-66)

· No.3(pp.67-109)

· No.4(pp.111-156)

Volume 1 (1996)

· No.1(pp.1-54)

· No.2(pp.55-100)

No.3(pp.81-113)

Home > Issues > Volume 13 (2008) > No.3(pp.81-113)

Annealing Effect on Exchange Bias in NiFe/FeMn/CoFe Trilayer Thin Films

Journal of Magnetics, Volume 13, Number 3, 30 Sep 2008, Pages 97-101

Ki-Yeon Kim*

(Neutron Science Division, Korea Atomic Energy Research Institute), Hyeok-Cheol Choi(Department of Physics, Inha University), Chun-Yeol You(Department of Physics, Inha University), Jeong-Soo Lee(Neutron Science Division, Korea Atomic Energy Research Institute)

Abstract

We investigated the exchange bias fields at the NiFe/FeMn and FeMn/CoFe interfaces in 18.9-nm NiFe/15.0-nm FeMn/17.6-nm CoFe trilayer thin films as the annealing temperature was varied from room temperature to 250℃ in a vacuum for 1 hour in a magnetic field of 150 Oe. Interestingly, magnetic hysteresis (M-H) measurements showed that NiFe/FeMn/CoFe trilayer thin films exhibited a completely contrasting variation of the exchange bias fields at both the NiFe/FeMn and FeMn/CoFe interfaces with annealing temperatures. High-angle X-ray diffraction (XRD) measurements indicated the absence of any discernible effect of thermal treatment on the NiFe(111) and FeMn(111) peaks. The compositional depth profile obtained from X-ray photoelectron spectroscopy (XPS) results presented the asymmetric compositional depth profiles of the Mn and Fe atoms throughout the FeMn layer. We contend that this asymmetric compositional depth profile and the preferential Mn diffusion into the NiFe layer, compared to that into the CoFe layer, are conclusive experimental evidence of the contrasting variation of the exchange bias fields at two interfaces having a common polycrystalline FeMn(111) layer.

Keywords: exchange bias; preferential Mn diffusion; XPS depth profile; thermal stability

DOI: 10.4283/JMAG.2008.13.3.97

Full Text: PDF

Copyright(c) 2009 The Korean Magnetics Society All rights reserved. E-mail : komag@unitel.co.kr