Suppression of magnetic coupling by in-plane buckling in SrFeO2.
Phys Rev Lett
; 112(9): 097001, 2014 Mar 07.
Article
in En
| MEDLINE
| ID: mdl-24655272
ABSTRACT
SrFeO2 is an insulating antiferromagnet with a remarkably high transition temperature in spite of its quasi-two-dimensional crystal structure. The magnetic exchange coupling is, however, very sensitive to a local mode involving transverse displacements of O and Fe, resulting in zigzag patterns of distortion. The buckling driven by rising temperatures is enhanced just as the Fe magnetic moment is reduced, implying a strong spin-lattice coupling. It is suggested that the undulations lead to orbital disorder by distorting the three possible paths to exchange interactions.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2014
Document type:
Article
Affiliation country:
United States