한국자기학회지 (Journal of the Korean Magnetics Society)

  • 제18권5호
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  • Pages.185-189
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  • 2008
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  • 1598-5385(pISSN)
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  • 2233-6648(eISSN)
한국자기학회 (The Korean Magnetics Society)
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수직자기이방성을 갖는 [Pd/Co]5/X/FeMn 다층박막에서 삽입층 물질과 두께에 따른 교환바이어스와 보자력의 의존성

Dependence of Coercivity and Exchange Bias by Thickness and Materials of Inserted Layer in [Pd/Co]5/X/FeMn Multilayer with Out-of-plane Magnetic Anisotropy

  • 발행 : 2008.10.31
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초록

수직자기이방성을 갖는 [Pd(0.6 nm)/$Co(0.2)]_5$/FeMn(10) 다층박막 구조를 이용하여 삽입층 물질과 각 물질의 두께 증가에 따른 보자력(coercivity, $H_c$)과 교환력(exchange bias, $H_{ex}$)의 변화를 관찰하였다. $[Pd(0.6 nm)/Co(0.2)]_4$/Pd(0.6)/NiFe(t)/FeMn(10) 구조에서 Co 대신에 NiFe를 삽입하였을 때 0.78 nm와 1.28 nm에서 360 Oe의 교환바이어스를 얻었다. [Pd(0.6 nm)/$Co(0.2)]_5$/FeMn(10) 다층박막 구조에서 Co/FeMn 사이 계면에 $Co_8Fe_2$와 $Co_9Fe_1$ 물질을 삽입하여 두께 증가에 따라 $Co_8Fe_2$의 경우 0.68 nm에서 30 Oe 증가한 380 Oe의 교환바이어스를 얻었다. $Co_9Fe_1$ 경우 두께 0.52 nm에서 약 200 Oe 증가한 580 Oe 가장 큰 교환바이어스를 얻었다.

We observe the change of coercivity and exchange bias, depending on inserting material and thickness in a [Pd(0.6 nm)/$Co(0.2)]_5$/ FeMn(10) multilayer structure with perpendicular anisotropy. When 0.78 and 1.28 nm thick NiFe substitutes for Co in a $[Pd(0.6 nm)Co(0.2)]_4$/Pd(0.6)/NiFe(t)/FeMn(10) structure, we obtain the exchange bias of 360 Oe. In addition, when $Co_8Fe_2$ and $Co_9Fe_1$ are inserted for Co/FeMn interface, we obtain the exchange bias of 380 nm for a 0.68 nm thick $Co_8Fe_2$ and 580 Oe for a 0.52 nm thick $Co_9Fe_1$.

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참고문헌

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