MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Crystal Distortion and Magnetic Structure of γ-MnPd Alloys
Tomiei HoriYoshinori TsuchiyaYoshinobu IshiiKiichi Hojou
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2002 Volume 43 Issue 3 Pages 436-438

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Abstract

We have made X-ray and neutron diffraction experiments and magnetic susceptibility measurements for γ-MnPd alloys. The alloy containing 10.5 at%Pd shows a face center orthorhombic structure with a=0.3839, b=0.3780 and c=0.3717 nm and a non-collinear antiferromagntic structure with μa=0, μb=1.26 and μc=2.14 μB/Mn atom at 10 K. The crystal distortion occurs from the orthorhombic structure to a tetragonal structure with ca<1 at 320 K, and finally to a cubic structure at 430 K. Another alloy with 13 at%Pd shows a face centered tetragonal with a=0.3800 and b=0.3846 nm (ca=1.012) at 293 K, and transforms to a cubic structure at 350 K. More Pd rich alloy with 15 at% shows [c] structure down to 27 K. A phase diagram for γ-MnPd alloy system with 8–17 at%Pd is proposed.

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© 2002 The Japan Institute of Metals and Materials
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