Abstract
The magnetic properties of Fei_,Rh, ordered and disordered alloys were studied in the last years [1-8]. Recently, Miyajima and Yuasa [2] have found that the fcc FeRh alloy was paramagnetic and stable at the room temperature. The change of bcc structure to a mixture phase composed of fcc and bct phases was performed by an application of uniaxial pressure of 2.5 x 10 4 kg/cm2 to the bcc FeRh alloy. The experimental lattice constant for bcc FeRh alloy was a = 2.981 A, and for the disordered fcc FeRh a = 3.731 A. In the bct FeRh Miyajima and Yuasa [2] found a = 2.81 A and c = 3.38 A (c/a = 1.203). In this paper we study the change of the electronic structure and magnetic moment in FeRh ordered alloy during the structural transformation from the CsCl to CuAu type structure. The method of calculations is presented in Sec. 2 and the main results are discussed in Sec. 3. Finally we give some conclusions.
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