ANTIFERROMAGNETIC COUPLING BETWEEN THE MN AND FE NEAREST NEIGHBORS IN FERROMAGNETIC MN-PT-10 AT-PERCENT FEстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Авторы:
TRHLIK M.,
DEMOOR P.,
ERZINKYAN AL,
GUREVICH GM,
PARFENOVA VP,
SCHUURMANS P.,
SEVERIJNS N.,
VANDERPOORTEN W.,
VANNESTE L.,
WOUTERS J.
Аннотация:The low-temperature nuclear orientation of Mn-54 in ferromagnetic Pt-10 at.% Fe has been studied in the temperature range 4-50 mK and in the external magnetic field range 0.5-8.5 T Considerable non-collinearity of Mn magnetic moments with respect to the bulk magnetization direction has been found in the whole B(ext) range. A model based on the Heisenberg Hamiltonian in the first-neighbour approximation is proposed, which fully describes our experimental data. We found that the first-neighbour Mn-Fe exchange interaction is antiferromagnetic with the value J(Mn-Fe) = -21(1) K, which lies in the range of the nearest-neighbour Mn-Mn or Fe-Fe exchange interaction parameter's for Pt-based alloys.