Negative magnetoresistance produced by Hall fluctuations in a ferromagnetic domain structure

Applied Physics Letters

Volumn 79, Issue 7, 2001, Pages 979-981

  Barabash, Sergey V ^a   Stroud, D ^a  

^a OHIO STATE UNIVERSITY   (United States)

Author keywords

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Indexed keywords

EID: 0035855078     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1392978     Document Type: Article

References (14)

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8. e relates the space-averaged effective field and current density, as defined in that paper.
9. e,xx will depend on the number and positions of the domain walls, rather than on the volume fractions p and 1 - p of the domains as it does in our model.
10. L. D. Landau and E. M. Lifshitz, Electrodynamics of Continuous Media, (Pergamon, Oxford, NY, 1984).
11. N. D. Mathur, P. B. Littlewood, N. K. Todd, S. P. Isaac, B.-S. Teo, D.-J. Kang, E. J. Tarte, Z. H. Barber, J. E. Evetts, and M. G. Blamire, J. Appl. Phys. 86, 6287 (1999).
12. For scalar conductivities, these values would lead to the familiar result that resistivities add in the direction perpendicular to the slab interfaces, while conductivities add in the parallel directions.
13. For experimental results at room temperatures, see, e g., R. A. Hajjar and M. Mansuripur, J. Appl. Phys. 72, 1528 (1992).
14. This negative MR would probably be little affected even if B varies smoothly in direction without changing its magnitude close to a domain wall, as likely in a real material.