Phase transition from spin glass to long-range magnetic order in semiconductor spinels CuCr1.5+0.5x
Sb0.5?0.5x
S4 (x=0.34 and 0.4) |
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Authors: | K P Belov T V Virovets L I Koroleva M Kh Mashaev |
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Institution: | (1) Moscow State University, 119899 Moscow, Russia |
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Abstract: | Reentrant behavior to a spin glass state is discovered in the solid solution system CuCr1.5+0.5x
Sb
x0.5−0.5
x
S
4
with x=0.34 and 0.4. The spin-glass transition temperature
T
f
determined from the kink in the temperature dependence of the initial susceptibility in an alternating magnetic field depends
on the measurement frequency ω. It is shown that the frequency dependence
T
f
(ω) is a power-law function 1/ω=(1/ω0)T
f
/(
T
f
−
T
*)]zv with
zv
=7.7 for both compositions. For the composition with
x
=0.34 a maximum is observed near
T
* in the temperature dependence of the resistivity. These facts indicate that the transition from the spin glass to long-range
magnetic order is a phase transition.
Pis’ma Zh. éksp. Teor. Fiz. 64, No. 4, 265–269 (25 August 1996) |
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Keywords: | |
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