TY - JOUR
T1 - A spin molecule model for geometrically frustrated spinel ZnFe 2O 4
AU - Tomiyasu, Keisuke
AU - Kamazawa, Kazuya
PY - 2011/12
Y1 - 2011/12
N2 - We analyzed the single-crystal neutron scattering data on a frustrated spinel ZnFe 2O 4, which is governed by dominant antiferromagnetic third-neighbor exchange interactions J 3 and additional ferromagnetic J 1 [K. Kamazawa et al.: Phys. Rev. B 68 (2003) 024412]. A spin dodecamer model that is formed on the kagome plane is proposed. It is notable that, although J 3 bonds consist of two types of exchange paths Fe-O-Fe-O-Fe and Fe-O-Zn-O-Fe, only the spatial spin correlations corresponding to the former paths are antiferromagnetic while those of all the latter paths are ferromagnetic in the dodecamer. This fact suggests that the frustration is relieved by utilizing the difference of exchange paths even in the same-distant interactions, that is to say, that only specific orbital mixing is selectively enhanced as an origin of the spin molecule.
AB - We analyzed the single-crystal neutron scattering data on a frustrated spinel ZnFe 2O 4, which is governed by dominant antiferromagnetic third-neighbor exchange interactions J 3 and additional ferromagnetic J 1 [K. Kamazawa et al.: Phys. Rev. B 68 (2003) 024412]. A spin dodecamer model that is formed on the kagome plane is proposed. It is notable that, although J 3 bonds consist of two types of exchange paths Fe-O-Fe-O-Fe and Fe-O-Zn-O-Fe, only the spatial spin correlations corresponding to the former paths are antiferromagnetic while those of all the latter paths are ferromagnetic in the dodecamer. This fact suggests that the frustration is relieved by utilizing the difference of exchange paths even in the same-distant interactions, that is to say, that only specific orbital mixing is selectively enhanced as an origin of the spin molecule.
KW - Geometrical frustration
KW - Molecular spin correlation
KW - Spin liquid
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U2 - 10.1143/JPSJS.80SB.SB024
DO - 10.1143/JPSJS.80SB.SB024
M3 - Article
AN - SCOPUS:84855302084
SN - 0031-9015
VL - 80
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - SUPPL. B
M1 - SB024
ER -