Phys. Rev. B 80, 024421 (2009) [5 pages]Local-moment ferromagnetism and unusual magnetic domains in Fe1/4TaS2 crystalsReceived 18 May 2009; revised 6 July 2009; published 22 July 2009 Single crystals of Fe1/4TaS2 have been studied by using magneto-optical (MO) imaging and radio-frequency magnetic susceptibility, χ. Real-time MO images reveal unusual slow dynamics of dendritic domain formation, the details of which are strongly dependent upon magnetic and thermal history. Measurements of χ(T) show well-defined local-moment ferromagnetic transition at T≈155 K as well as thermal hysteresis for 50<T<60 K. This temperature range corresponds to the domain-formation temperature as determined by MO. Together these observations provide strong evidence for local-moment ferromagnetism in Fe1/4TaS2 crystals with large temperature-dependent magnetic anisotropy. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.80.024421
DOI:
10.1103/PhysRevB.80.024421
PACS:
75.30.Cr, 75.60.Ch, 75.60.Nt
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