Journal of the Physical Society of Japan · 1988 · 17 citations · 7 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsMagnetic MaterialsThermodynamicsAntiferromagnetismCurie TemperatureFerromagnetic MaterialsFerromagnetismMagnetic Properties Of SolidsPhase TransitionsFerromagnetic Phase TransitionsHigh-pressure Phase TransitionsMagnetic Phase DiagramMagnetic Phase TransitionsMagnetic PropertiesPhase Transition TemperaturePressure-induced Phase TransitionsSecond-order Magnetic Transitions
The effect of pressure on the magnetic phase transition temperature of Hf 1- x Ta x Fe 2 with x =0 and x =0.1 has been studied. The Curie temperature for x =0 decreases with increasing pressure at a rate of -(1.2±1.0) K/kbar, and for x =0.1 it decreases with a pressure coefficient of -7.5 K/kbar up to about 8 kbar and above 8 kbar two magnetic phase transitions, one being of the first order and the other of the second order, are induced by applying pressure. The former is a phase transition from a ferromagnetic to an antiferromagnetic phase. The transition temperature decreases at a rate of -10.0 K/kbar. The latter is a phase transition from an antiferromagnetic to a paramagnetic phase. The transition temperature decreases at a rate of -5.1 K/kbar. These results under pressure are compared with the results obtained by partial substitution of Ta for Hf in HfFe 2 .
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