TY - JOUR
T1 - Suppression of magnetic coupling by in-plane buckling in SrFeO 2
AU - Horigane, Kazumasa
AU - Llobet, Anna
AU - Louca, Despina
PY - 2014/3/4
Y1 - 2014/3/4
N2 - 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.
AB - 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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U2 - 10.1103/PhysRevLett.112.097001
DO - 10.1103/PhysRevLett.112.097001
M3 - Article
AN - SCOPUS:84896379225
SN - 0031-9007
VL - 112
JO - Physical Review Letters
JF - Physical Review Letters
IS - 9
M1 - 097001
ER -