Giant magnetic coercivity and ionic superlattice nano-domains in Fe 0.25TaS2

Y. J. Choi; S. B. Kim; T. Asada; S. Park; Weida Wu; Y. Horibe; S. W. Cheong

doi:10.1209/0295-5075/86/37012

Giant magnetic coercivity and ionic superlattice nano-domains in Fe _0.25TaS₂

Y. J. Choi, S. B. Kim, T. Asada, S. Park, Weida Wu, Y. Horibe, S. W. Cheong

Department of Physics

Research output: Contribution to journal › Article

17 Citations (Scopus)

Abstract

We have explored giant magnetic coercivity (H_c≈7 tesla) in the highly anisotropic ferromagnet of Fe_0.25TaS₂ through harnessing order of Fe²⁺ ions intercalated in-between TaS₂ layers. Fe ions order well in annealed crystals and form a (1/2,0,0) superlattice. However, a (1/3,1/3,0) superlattice, in addition to the (1/2,0,0) superlattice, can form in quenched crystals. These coexisting superlattices with nano-size domains result in significant change of magnetic domain configurations and huge enhancement of H_c, probably through efficient magnetic domain wall pinning by nano-size superlattice domains.

Original language	English
Article number	37012
Journal	EPL
Volume	86
Issue number	3
DOIs	https://doi.org/10.1209/0295-5075/86/37012
Publication status	Published - 2009 Nov 27

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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Choi, Y. J., Kim, S. B., Asada, T., Park, S., Wu, W., Horibe, Y., & Cheong, S. W. (2009). Giant magnetic coercivity and ionic superlattice nano-domains in Fe _0.25TaS₂. EPL, 86(3), [37012]. https://doi.org/10.1209/0295-5075/86/37012

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abstract = "We have explored giant magnetic coercivity (Hc≈7 tesla) in the highly anisotropic ferromagnet of Fe0.25TaS2 through harnessing order of Fe2+ ions intercalated in-between TaS2 layers. Fe ions order well in annealed crystals and form a (1/2,0,0) superlattice. However, a (1/3,1/3,0) superlattice, in addition to the (1/2,0,0) superlattice, can form in quenched crystals. These coexisting superlattices with nano-size domains result in significant change of magnetic domain configurations and huge enhancement of Hc, probably through efficient magnetic domain wall pinning by nano-size superlattice domains.",

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AU - Choi, Y. J.

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AU - Wu, Weida

AU - Horibe, Y.

AU - Cheong, S. W.

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