Pressure effects of the ferromagnetic Heusler alloy Rh2NiGe

Magnetic properties under pressure have been investigated on the weak itinerant electron ferromagnet Rh2NiGe. The pressure derivative of the Curie temperature TC has been obtained from the results of the temperature dependence of the initial permeability under pressure up to 10 kbar. The value of dTC/dp is found to be −0.60 K/kbar. The pressure change of the spontaneous magnetization σs at 4.2 K for Rh2NiGe has been determined by the subtraction method under pressure up to 10 kbar. The value of dσs/dp is found to be −0.014 emu/g kbar. The obtained results are analyzed using the spin fluctuation theory.