Physics – Condensed Matter – Materials Science
Scientific paper
2010-06-15
Physics
Condensed Matter
Materials Science
15 pages, 5 figures and 1 table. Submitted for publication
Scientific paper
Tailoring the phase stability and magnetic structure by combining the antiferromagnetic MnNiGe martensite with ferromagnetic MnFeGe austenite, a magnetic-field-induced martensitic transformation has been achieved in MnNi1-xFexGe system. The doped Fe enables the isolated structural and magnetic transitions of MnNiGe to coincide at room temperature and also establishes ferromagnetic couplings in six-Mn-centering-one-Fe-atom clusters. The ferromagnetic clusters transit the antiferromagnetic state in martensite to a ferromagnetic state and the alloys are further induced to a stronger ferromagnetic state by external field, resulting in a large magnetization difference up to 50 emu/g across the transformation. The field-induced martensitic transformation thus experiences a multiple metamagnetization process.
Chen Jing-Ling
Feng Longlong
Li Jonathan G.
Liu E. K.
Wang Wei-Hao
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