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Structural transformation induced by magnetic field and "colossal-like" magnetoresistance response above 313 K in MnAs.

Abstract:

MnAs exhibits a first-order phase transition from a ferromagnetic, high-spin metal hexagonal phase to a paramagnetic, lower-spin insulator orthorhombic phase at T(C)=313 K. Here, we report the results of neutron diffraction experiments showing that an external magnetic field, B, stabilizes the hexagonal phase above T(C). The phase transformation is reversible and constitutes the first demonstration of a bond-breaking transition induced by a magnetic field. The field-induced phase transition i...

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Authors


Rivadulla, F More by this author
Fondado, A More by this author
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Journal:
Physical review letters
Volume:
90
Issue:
9
Pages:
097203
Publication date:
2003-03-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:9d887441-6121-41f3-96c3-7d0bd63fbb53
Source identifiers:
66274
Local pid:
pubs:66274
Language:
English

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