Magnetic properties of exchange-coupled PtFe/Fe films with spacer layers

Magnetic properties of exchange-coupled PtFe/Fe films with spacer layers
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具有间隔层的交换耦合 PtFe/Fe 薄膜的磁性能

DOI:
10.1063/1.3559473
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发表时间:
2011-03
影响因子:
3.2
通讯作者:
Zhang, Z. D.
Zhang, Z. D.
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Cui, W. B.;Liu, W.;Yang, F.;Li, D.;Delikanli, S.;Guo, S.;Gong, W. J.;Zhang, Z. D.

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在有Cr_2O_3或Cr_2O_3/Cu间隔层的PtFe/Fe薄膜中,PtFe与Fe之间的交换耦合是间接的、长程的。研究了沉积态和退火态薄膜的微结构。PtFe/Cr_2O_3(5A)/Fe(25 A)薄膜的矫顽力大于10 kOe,但随着Cr_2O_3间隔层的增加而降低。而将中间层改为Cr_2O_3(x A)/Cu(5 A)(5 A ≤ x ≤ 25 A),则可使矫顽力保持在10 kOe左右。对于一个固定的总厚度的间隔层,的矫顽力一般随Cr 2 O 3的Cu逐渐取代,表明不同的效果介导的PtFe和Fe之间的交换耦合的间隔层。采用Cr_2O_3或Cr_2O_3/Cu作为间隔层是实现交换耦合PtFe/Fe复合薄膜的一种很有前途的方法。
The exchange coupling between PtFe and Fe in PtFe/Fe films with Cr2O3 or Cr2O3/Cu spacer layers is indirect and long range. Microstructures of as-deposited and annealed thin films are studied. Coercivity over 10 kOe is obtained in PtFe/Cr2O3(5 A)/Fe(25 A) films but decrease with thicker Cr2O3 spacer layer. Comparably, coercivity can be maintained at about 10 kOe if spacer layer is changed into Cr2O3(x A)/Cu(5 A) (5 A ≤ x ≤ 25 A). For a fixed total thickness of the spacer layers, the coercivity generally decreases with gradual replacement of Cr2O3 by Cu, indicating the different effects of spacer layers on mediating the exchange coupling between PtFe and Fe. Using Cr2O3 or Cr2O3/Cu as a spacer layer is a promising way for realizing exchange-coupled PtFe/Fe composite films.
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