Temperature-dependent anisotropic magnetoresistance inversion behaviors in Fe₃O₄ films
- Authors
- Yoon, Kap Soo; Hong, Jin Pyo
- Issue Date
- Feb-2017
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Fe3O4 thin films; Inversion behavior; Domain wall scattering
- Citation
- JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.423, pp.7 - 11
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
- Volume
- 423
- Start Page
- 7
- End Page
- 11
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/152963
- DOI
- 10.1016/j.jmmm.2016.09.067
- ISSN
- 0304-8853
- Abstract
- We address the abnormal anisotropic magnetoresistance (AMR) reversal feature of half-metallic polycrystalline Fe3O4 films occurring at a specific temperature. Experimental results revealed a positive to negative MR transition in the Fe3O4 films at 264 K, which reflect the influence of additional domain wall scattering. These features was described by a correlation between domain wall resistance and inversion behavior of AMR with additional domain wall scattering factors. We further describe a possible model based on systematic structural and electrical measurements that employs a temperature-dependent domain wall width and spin diffusion length of the conducting electrons. This model allows for spin-flipping scattering of spin polarized electrons inside a proper domain width.
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