Volume 86, Number 3, May 2009
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||21 May 2009|
Giant magnetic coercivity and ionic superlattice nano-domains in Fe0.25TaS2
Rutgers Center for Emergent Materials and Department of Physics & Astronomy - 136 Frelinghuysen Road, Piscataway, NJ, 08854, USA
2 Laboratory of Pohang Emergent Materials and Department of Physics, Pohang University of Science and Technology - Pohang 790-784, Korea
3 Research Department, NISSAN ARC, LTD. - Yokosuka, Kanagawa 237-0061, Japan
Accepted: 20 April 2009
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.
PACS: 75.50.Vv – High coercivity materials / 75.50.Ww – Permanent magnets / 75.30.Gw – Magnetic anisotropy
© EPLA, 2009
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