Giant magnetoresistive effects in a single element magnetic thin film.
Citation:J F Gregg, W Allen, K Ounadjela, M Viret, M Hehn, S M Thompson, J M D Coey 'Giant magnetoresistive effects in a single element magnetic thin film' in Physical Review Letters, 77, (8), 1996, pp 1580 - 1583
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By exploiting the simplicity of a novel transport measurement on a ferromagnetic striped domain structure in a thin film of cobalt, we report the first direct observation of ferromagnetic domain wall scattering and what we believe to be the first clear indication of giant magnetoresistive effects in a homogeneous magnetic system. (The colossal MR effect, while seen in homogeneous materials, is believed to originate from a charge ordering phenomenon [see, for example, Y. Tokura et al., J. Appl. Phys. 79, 5288 (1996), and references therein], and is therefore distinct from GMR, which is an effect arising from spin dependent scattering.) A new model is proposed to describe these observations which highlights the crucial role played by electron spin precession in determining the electrical transport properties of magnetic interfaces.
Author: COEY, JOHN MICHAEL DAVID
Publisher:American Physical Society
Series/Report no:Physical Review Letters
Availability:Full text available