Fèlix Casanova et al 2005 J. Phys. D: Appl. Phys. 38 3343 doi:10.1088/0022-3727/38/18/002
Fèlix Casanova1, Sophie de Brion2, Amílcar Labarta1 and Xavier Batlle1
Show affiliationsIsothermal magnetization curves up to 23 T were measured in Gd5(SixGe1−x)4 alloys for x ≤ 0.1. We show that a field-induced transition occurs from the antiferromagnetic (AFM) phase to a state in which competing short-range AFM and ferromagnetic (FM) correlations are present. This is based on the abrupt change in the slope of the high-temperature magnetization isotherms at high fields (~14–15 T). Results suggest that the transition is due to the breaking of the long-range AFM ordering by the magnetic field. This induces short-range FM correlations favouring the formation of coexisting FM and AFM clusters. A further increase of the magnetic field leads to the percolation of the former, giving rise to long-range FM order.
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
75.50.Cc Other ferromagnetic metals and alloys
75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
Issue 18 (21 September 2005)
Received 31 March 2005, in final form 27 July 2005
Published 2 September 2005
Fèlix Casanova et al 2005 J. Phys. D: Appl. Phys. 38 3343
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