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Magnetoresistance of MnFeP/sub 0_55/As/sub 0_45/

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5 Author(s)
Tegus, O. ; Universiteit van Amsterdam ; Bruck, E. ; Dagula ; de Boer, F.R.
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We have measured the dependence on magnetic field and temperature of the electrical resistance and magnetization of MnFeP0.55As0.45, which undergoes a reversible first-order ferromagnetic-to-paramagnetic phase transition at a critical temperature Tcr = 231 K. The electrical resistance R(T) measured by cooling to low temperatures in zero magnetic field has a usual metallic character. The isothermal magnetic-field dependence of the magnetoresistance from 243 K to 265 K indicates the presence of temperature-dependent critical magnetic fields that transform the paramagnetic phase into the ferromagnetic phase. The critical-magnetic-field diagram determined from the isothermal magneticfield dependencies of the electrical resistance of MnFeP0.55As0.45 shows that the field hysteresis is about 1 T between the increasingand decreasing-field cycles.

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Magnetics, IEEE Transactions on  (Volume:38 ,  Issue: 5 )