Journal
PHYSICAL REVIEW B
Volume 80, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.024421
Keywords
ferromagnetic materials; iron compounds; magnetic anisotropy; magnetic domains; magnetic susceptibility; tantalum compounds
Funding
- Department of Energy, Office of Basic Energy Sciences [DE-AC02-07CH11358, DE-FG02-98ER45706]
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Single crystals of Fe1/4TaS2 have been studied by using magneto-optical (MO) imaging and radio-frequency magnetic susceptibility, chi. 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 chi(T) show well-defined local-moment ferromagnetic transition at T approximate to 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.
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