中国物理B ›› 2002, Vol. 11 ›› Issue (1): 54-57.doi: 10.1088/1009-1963/11/1/312

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Magnetic behaviour investigation on symmetric spin valves of Co/Cu/NiFe and NiFe/Cu/Co

李铁, 沈鸿烈   

  1. State Key Laboratory of Transducer Technology, Shanghai Institute of Metallurgy, Chinese Academy of Sciences, Shanghai 200050, China
  • 收稿日期:2001-05-18 修回日期:2001-09-09 出版日期:2005-06-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the Shanghai Research Center for Applied Physics (Grant No. 99JC14003), and the Shanghai Research and Development Foundation for Application Materials (Grant No. 98006).

Magnetic behaviour investigation on symmetric spin valves of Co/Cu/NiFe and NiFe/Cu/Co

Li Tie (李铁), Shen Hong-Lie (沈鸿烈)   

  1. State Key Laboratory of Transducer Technology, Shanghai Institute of Metallurgy, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2001-05-18 Revised:2001-09-09 Online:2005-06-12 Published:2005-06-12
  • Supported by:
    Project supported by the Shanghai Research Center for Applied Physics (Grant No. 99JC14003), and the Shanghai Research and Development Foundation for Application Materials (Grant No. 98006).

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摘要： In this paper, we have obtained and investigated the magnetic behaviours of the ferromagnetic layer in the symmetric spin valves of Co/Cu/NiFe and NiFe/Cu/Co by measuring with a vibrating sample magnetometer and analysing in terms of the multi-domain Ising models. It has been found that some magnetic layer can have quite different magnetic behaviours in different structures of spin valves, depending on the properties of the under-layer. In our investigation, we have found that the magnetic behaviour of a Co layer depends mainly on the magnetization of the under-layer, whereas this is not the case for the NiFe layer.

Abstract: In this paper, we have obtained and investigated the magnetic behaviours of the ferromagnetic layer in the symmetric spin valves of Co/Cu/NiFe and NiFe/Cu/Co by measuring with a vibrating sample magnetometer and analysing in terms of the multi-domain Ising models. It has been found that some magnetic layer can have quite different magnetic behaviours in different structures of spin valves, depending on the properties of the under-layer. In our investigation, we have found that the magnetic behaviour of a Co layer depends mainly on the magnetization of the under-layer, whereas this is not the case for the NiFe layer.

Key words: magnetic property, spin valve, giant magnetoresistance, sandwich

中图分类号:  (Galvanomagnetic and other magnetotransport effects)

  • 72.15.Gd
75.47.De (Giant magnetoresistance) 75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures)) 75.10.Hk (Classical spin models) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects) 75.60.Ch (Domain walls and domain structure)