Appearance Of Ferromagnetism In Heusler Alloy Ru2mn1-Xvxge
INTERNATIONAL CONFERENCE ON MAGNETISM (ICM 2009)(2010)
Abstract
The crystallographic and magnetic properties of the quaternary Heusler alloys Ru2Mn1-xVxGe were investigated. Although the end members, Ru2MnGe (x = 0) and Ru2VGe (x = 1), are antiferromagnetic and paramagnetic, ferromagnetism with Curie temperature over 200 K appeared at about x = 0.3. The saturation magnetization had a maximum (1.6 mu(B)/f.u.) at x = 0.5. The ferromagnetism was explained by a model which assumes a preferential site occupation of V atoms and a collapsing of the next nearest-neighbor antiferromagnetic Mn-Mn interactions by V.
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