Effect of Fe substitution on magnetic properties of antiferromagnetic Heusler alloy Ru sub(2)MnGe

The present study reveals that the correlation between the magnetic properties with composition x in the polycrystalline Ru sub(2)Mn sub(1-x)Fe sub(x)Ge system. Hard ferromagnetic properties appeared at the intermediate composition between antiferromagnetic Ru sub(2)MnGe with soft ferromagnetic Ru s...

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Bibliographic Details
Published in:Journal of alloys and compounds 2012-01, Vol.510 (1), p.141-146
Main Authors: Mizusaki, S, Douzono, A, Ohnishi, T, Ozawa, T C, Samata, H, Noro, Y, Nagata, Y
Format: Article
Language:English
Subjects:
Alloys
Antiferromagnetism
Boundaries
Correlation
Ferromagnetism
Magnetic properties
Magnetoresistance
Magnetoresistivity
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Summary:The present study reveals that the correlation between the magnetic properties with composition x in the polycrystalline Ru sub(2)Mn sub(1-x)Fe sub(x)Ge system. Hard ferromagnetic properties appeared at the intermediate composition between antiferromagnetic Ru sub(2)MnGe with soft ferromagnetic Ru sub(2)FeGe. Ru sub(2)Mn sub(0.6)Fe sub(0.4)Ge shows an anisotropic and negative magnetoresistance (MR) effect more than 8% although the both end materials are small MR effect less than 1%. These experimental results correlate the variation in MR ratio with that of coercive field as a function of x. Moreover, the correlation is shown at the boundary of magnetism between antiferromagnetic and ferromagnetic. Therefore, the present experimental results imply that the coexistence of antiferromagnetic and soft ferromagnetic leads to induce the MR effect in this system.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2011.09.017