Giant magnetic coercivity and ionic superlattice nano-domains in Fe0.25TaS2

초록

We have explored giant magnetic coercivity (H-c approximate to 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 H-c, probably through efficient magnetic domain wall pinning by nano-size superlattice domains. Copyright (C) EPLA, 2009

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