Exchange bias in [Co2MnGe/Au]n, [Co2MnGe/Cr]n and [Co2MnGe/Cu2MnAl]n multilayers

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:257

Article

Westerholt, K ; Geiersbach, U ; Bergmann, A

关键词: half metallic ferromagnets;    Heusler compounds;    exchange bias;   

DOI  :  10.1016/S0304-8853(02)01175-7

来源: Elsevier

【 摘 要 】

We report structural and magnetic properties of multilayers composed of thin layers of the half, metallic ferromagnetic Hensler compound Co2MnGe and layers of An, Cr and the Heusler compound Cu2MnAl. The hysteresis loops measured at low temperatures reveal the existence of an exchange bias field H-eb in all of these multilayers. For the [Co2MnGe/Au](n) multilayer system H-eb is largest reaching up to I kOe at a temperature of 2 K. We characterize the exchange bias phenomenon in detail and show that it originates from a spin glass type of magnetic order for a thin interlayer at the interfaces. We discuss the results in the light of different models proposed for the explanation of the exchange bias effect. (C) 2002 Elsevier Science B.V. All rights reserved.

【 授权许可】

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