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Sharp switching of the magnetization in Fe1/4TaS2 | | E. Morosan
; H. W. Zandbergen
; Lu Li
; Minhyea Lee
; J. G. Checkelsky
; M. Heinrich
; T. Siegrist
; N. P. Ong
; R. J. Cava
; | | Date: |
14 Jan 2007 | | Subject: | Strongly Correlated Electrons | | Abstract: | Anisotropic magneto-transport measurements are reported on Fe1/4TaS2 single crystals grown by vapor transport. Both the magnetization and resistivity are extremely anisotropic, with the magnetic moments aligned parallel to the c crystallographic direction. Fe1/4TaS2 orders ferromagnetically below TC = 160 K and displays very sharp hysteresis loops in the ordered state for H c. The corresponding magnetoresistance is negative, and it qualitatively reproduces the features observed in the M(H) data, by showing a sharp drop around the critical field Hs for the moment reversal. The magnetization switching time shows an unusual increase with increasing temperature. For field applied within the ab plane, the magnetization remains small and linear in field up to 5 T, and the magnetoresistance is positive and quadratic in field, with no visible hysteresis. The squareness of the H c M(H) loops and the high critical field for the magnetization switch (Hs = 3.7 T at T = 2 K) allow us to classify Fe1/4TaS2 as a strong ferromagnet. | | Source: | arXiv, cond-mat/0701311 | | Services: | Forum | Review | PDF | Favorites | |
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