Magnetoelectric effect in an XY-like spin glass system Ni{x}Mn{1-x}TiO{3}.
Phys Rev Lett
; 108(5): 057203, 2012 Feb 03.
Article
em En
| MEDLINE
| ID: mdl-22400956
ABSTRACT
Magnetoelectric (ME) properties were investigated for an XY-like spin glass (SG) system, Ni{x}Mn{1-x}TiO{3} with an ilmenite structure. The ME effect is usually observed in systems with peculiar couplings between a crystal lattice and a magnetic order. Nonetheless, we found an antisymmetric ME effect with nonzero ME tensor elements below T{ME}=8-10 K in samples showing SG transitions. At T{ME}, no specific heat anomaly was observed, suggesting the absence of long-range magnetic order. We discuss the origin of the ME effect in the XY-like SG system in terms of an alignment of toroidal moments.
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2012
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