Relation between interfacial magnetism and spin-dependent scattering at non-ideal Fe/Cr and Fe/V interfaces

R. Coehoorn

doi:10.1016/0304-8853(95)00506-4

Relation between interfacial magnetism and spin-dependent scattering at non-ideal Fe/Cr and Fe/V interfaces

R. Coehoorn

Research output: Contribution to journal › Article › Academic › peer-review

69 Citations (Scopus)

Abstract

First principles band structure calculations have been performed for (110) and (100) Fe/Cr and Fe/V superlattices with mixed monolayers at the interfaces, with atomic concentrations in the mixed layers throughout the entire concentration range. In addition, (211) and (111) superlattices with perfect interfaces have been studied. For Fe/V systems the moments at the interfaces depend strongly on the nearest neighbour environment. Conversely, Fe and Cr moments at Fe/Cr interfaces show almost no dependence on the nearest neighbour environment. We explain the latter behaviour as the result of competing antiferromagnetic exchange interactions at the interface, and discuss why this behaviour is crucial to the strong spin dependence of scattering at Fe/Cr interfaces, which gives rise to the very large giant magnetoresistance effect observed for Fe/Cr multilayers. Implications are given for the temperature dependence of the GMR ratio.

Original language	English
Pages (from-to)	341-353
Number of pages	13
Journal	Journal of Magnetism and Magnetic Materials
Volume	151
Issue number	3
DOIs	https://doi.org/10.1016/0304-8853(95)00506-4
Publication status	Published - 1 Jan 1995
Externally published	Yes

Funding

I am grateful to Prof. Dr. W.H. Butler for allowing me to make use of his results on Fe-Cr alloys prior to publication. This research was supported in part by the European Community ESPRIT3 Basic Research project 'Study of Magnetic Multilayers for Magnetoresistive Sensors' (SmMmS).

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abstract = "First principles band structure calculations have been performed for (110) and (100) Fe/Cr and Fe/V superlattices with mixed monolayers at the interfaces, with atomic concentrations in the mixed layers throughout the entire concentration range. In addition, (211) and (111) superlattices with perfect interfaces have been studied. For Fe/V systems the moments at the interfaces depend strongly on the nearest neighbour environment. Conversely, Fe and Cr moments at Fe/Cr interfaces show almost no dependence on the nearest neighbour environment. We explain the latter behaviour as the result of competing antiferromagnetic exchange interactions at the interface, and discuss why this behaviour is crucial to the strong spin dependence of scattering at Fe/Cr interfaces, which gives rise to the very large giant magnetoresistance effect observed for Fe/Cr multilayers. Implications are given for the temperature dependence of the GMR ratio.",

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AB - First principles band structure calculations have been performed for (110) and (100) Fe/Cr and Fe/V superlattices with mixed monolayers at the interfaces, with atomic concentrations in the mixed layers throughout the entire concentration range. In addition, (211) and (111) superlattices with perfect interfaces have been studied. For Fe/V systems the moments at the interfaces depend strongly on the nearest neighbour environment. Conversely, Fe and Cr moments at Fe/Cr interfaces show almost no dependence on the nearest neighbour environment. We explain the latter behaviour as the result of competing antiferromagnetic exchange interactions at the interface, and discuss why this behaviour is crucial to the strong spin dependence of scattering at Fe/Cr interfaces, which gives rise to the very large giant magnetoresistance effect observed for Fe/Cr multilayers. Implications are given for the temperature dependence of the GMR ratio.

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Relation between interfacial magnetism and spin-dependent scattering at non-ideal Fe/Cr and Fe/V interfaces

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