TITLE

Conversion of magnetic structure by slight dopants in geometrically frustrated antiperovskite Mn3GaN

AUTHOR(S)
Takenaka, K.; Inagaki, T.; Takagi, H.
PUB. DATE
September 2009
SOURCE
Applied Physics Letters;9/28/2009, Vol. 95 Issue 13, p132508
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We found that a few percent of Fe dopants at the Mn sites alters the antiferromagnetic spin structure of Mn3GaN and induces a first-order antiferromagnetic-ferromagnetic phase transition accompanied by a large volume change. The drastic conversion of the spin alignment originates from phase competition due to a geometrical frustration in the Mn6N octahedron. This result demonstrates that the magnetic and other unique related properties of manganese antiperovskites are controllable by element substitution. Comparing with the ferromagnetic state in Mn3Ga(N1-xCx), we discuss a possible spin structure that accounts for the conversion of the magnetic states.
ACCESSION #
44449100

 

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