상부와 하부 IrMn층을 갖는 단일구조 및 이중구조 거대자기저항-스핀밸브 다층박막의 자기적 특성 비교 분석

다국어 초록 (Multilingual Abstract)

The antiferromagnet IrMn based four different GMR-SV multilayers on Corning glass were prepared by using ion beam deposition and DC magnetron sputtering system. The magnetoresistance (MR) properties for single-type and dual-type GMR-SV multilayer films were investigated through the measured major and minor MR curves. The exchange bias coupling field (H<SUB>ex</SUB>) and coercivity (H<SUB>c</SUB>) of pinned layer, the Hc and interlayer exchange coupling field (H<SUB>int</SUB>) of free layer for the dual-type structure GMR-SV multilayer films consisted of top IrMn layer were 410 Oe, 60 Oe, 1.6 Oe, and 7.0 Oe, respectively. The minor MR curve of two free layers was performed the squarelike feature having a MR ratio of 8.7% as the sum of 3.7% and 5.0%. The value of average magnetic field sensitivity (MS) was maintained at 2.0 %/Oe. Also, the magnetoresistance properties of the single-type and dual-type structure GMRSV multilayer films consisted of bottom IrMn layer were decreased more than those of top IrMn layer. Two antiparallel states of magnetization spin arrays of the pinned and free layers in the dual-type GMR-SV multilayer films occurred the maximum MR value by the effect of spin dependence scattering.

참고문헌 (Reference)

1 M. D. Cubells-Beltrán, 16 : 939-, 2016

2 J. V. Kim, 71 : 094405-, 2005

3 M. J. Kim, 11 : 72-, 2001

4 S. H. Jang, 10 : 196-, 2000

5 J. G. Choi, 519 : 8394-, 2011

6 J. R. Childress, 99 : 08-305, 2006

7 S. S. Lee, 95 : 7525-, 2004

8 H. R. Kaufman, 21 : 725-, 1982

9 카지드마, "이중구조 거대자기저항-스핀밸브 박막의 자기등방성 영역분포에 관한 연구" 한국자기학회 23 (23): 193-199, 2013

10 이원형, "Uniaxial Magnetic Anistotropy of a NiO-Spin Valve Device" 한국자기학회 14 (14): 18-22, 2009

11 purevdorj khajidmaa, "Rotation Effect of In-plane FM layer on IrMn Based GMR-SV Film" 한국자기학회 22 (22): 7-13, 2017

12 이상석, "Ni80Fe20/[Ir22Mn78Mn]/Co75Fe25 다층박막에서 Mn 함유량에 의존하는 교환결합력과 열적안정성" 한국자기학회 13 (13): 187-192, 2003

13 양우일, "Nb 버퍼층과 거대자기저항-스핀밸브 하이브리드 다층박막의 자기저항 특성" 한국자기학회 27 (27): 82-86, 2017

14 S. X. Wang, "Magnetic Information Storage Technology" Academic Press 123-176, 1991

15 M. Fecioru-Morariu, "Exchange bias in metallic ferromagnetic and antiferromagnetic bilayers. Effects of structure, dilution, anisotropy and temperature" Institute of Physics of RTWH Aachen 2008

16 최종구, "Exchange Bias Field and Coercivity of [NiFe/NiFeCuMo/NiFe]/FeMn Multilayers" 한국물리학회 62 (62): 1954-1957, 2013