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Nonuniform Magnetic States and Electrical Properties of {\rm Sm}_{\rm X}{\rm Mn}_{1-{\rm X}}{\rm S} Solid Solutions

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7 Author(s)
Aplesnin, S.S. ; M.F. Reshetneva Aircosmic Siberian State Univ., Krasnoyarsk, Russia ; Har'kov, A.M. ; Eremin, E.V. ; Romanova, O.B.
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The real and imaginary parts of magnetic permeability at the three frequencies 100 Hz, 1 kHz and 10 kHz and magnetic moment in magnetic field H = 0.05 T in the SmXMn1-XS(0.1 ≤ × ≤ 0.25) solid solutions at the temperatures 5 K-300 K were measured. Magnetization curves were measured in the range of fields - 9 T <; H <; 9 T at the temperatures T = 5 K, 50 K. Non-linear behavior of the magnetization versus field, residual magnetic moment, logarithmic dependence of imaginary parts of the magnetic permeability maximum on frequency and sharp drop of Im(μ) at T <; 40 K for compound Sm0.25Mn0.75S were found. The electrical resistivity of the SmXMn1-XS(0.15 <; x <; 0.25) solid solution in the range of temperatures 80 K-300 K were measured. Minimum and maximum in the temperature dependence of the resistivity were found respectively at T = 220 K for X = 0.15 and at T = 100 K for X = 0.2 compounds. This behavior is explained a result of the mobility edge movement and the disorder of the deformation and spin density fluctuations with short-range order.

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Magnetics, IEEE Transactions on  (Volume:47 ,  Issue: 10 )