Magnetic vortex structures probed by magnetotransport in sub-micron permalloy disks

C. Y. Kuo, T. Y. Chung, Shih-ying Hsu

Research output: Contribution to journalConference article

1 Scopus citations

Abstract

We have successfully used magneto-transport measurement to study magnetization reversal of domain structure in single sub-micron magnetic disks of various sizes, 300nm ≤ diameter ≤ 5μm and 36nm ≤ thickness ≤ 48nm. The magnetoresistance (MR) resulted from the anisotropic magnetoresistance effect can reveals the magnetization reversal of a single disk as confirmed by the magnetic force microscopic results. For a fixed thickness, the remanent domain state can transits from the multi-domain to vortex states by decreasing the disk diameter. Here, the nucleation and annihilation fields of vortex core are determined from disk's hysteretic MR and analytically described by the micromagnetic LLG calculation incorporated with the "rigid" vortex model developed by Guslienko et al. under the consideration of magnetostatic, exchange, and Zeeman energies.

Original languageEnglish
Article number032037
JournalJournal of Physics: Conference Series
Volume200
Issue numberSECTION 3
DOIs
StatePublished - 1 Jan 2010

Fingerprint Dive into the research topics of 'Magnetic vortex structures probed by magnetotransport in sub-micron permalloy disks'. Together they form a unique fingerprint.

  • Cite this