TY - JOUR
T1 - Formation of a three-dimensional network of v trimers in A2V13O22 (A=Ba, Sr)
AU - Miyazaki, J.
AU - Matsudaira, K.
AU - Shimizu, Y.
AU - Itoh, M.
AU - Nagamine, Y.
AU - Mori, S.
AU - Kim, J. E.
AU - Kato, K.
AU - Takata, M.
AU - Katsufuji, T.
PY - 2010/5/18
Y1 - 2010/5/18
N2 - We found that in A2V13O22 (A=Ba, Sr), which contains a trilayer slab of VO in the sodium-chloride structure with periodically missing ions, the trimerization of V ions occurs at 290 K (A=Ba) and 380 K (A=Sr). V trimers form a three-dimensional network, but some V ions remain untrimerized in these compounds. The suppression of magnetic susceptibility with trimerization and the existence of a Curie tail at low temperatures, together with the result of NMR measurement, indicate that the V trimers are spin singlet, whereas the untrimerized V ions have a magnetic moment; i.e., there is a spontaneous separation between nonmagnetic and magnetic ions in the crystal.
AB - We found that in A2V13O22 (A=Ba, Sr), which contains a trilayer slab of VO in the sodium-chloride structure with periodically missing ions, the trimerization of V ions occurs at 290 K (A=Ba) and 380 K (A=Sr). V trimers form a three-dimensional network, but some V ions remain untrimerized in these compounds. The suppression of magnetic susceptibility with trimerization and the existence of a Curie tail at low temperatures, together with the result of NMR measurement, indicate that the V trimers are spin singlet, whereas the untrimerized V ions have a magnetic moment; i.e., there is a spontaneous separation between nonmagnetic and magnetic ions in the crystal.
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U2 - 10.1103/PhysRevLett.104.207201
DO - 10.1103/PhysRevLett.104.207201
M3 - Article
AN - SCOPUS:77952535937
SN - 0031-9007
VL - 104
JO - Physical Review Letters
JF - Physical Review Letters
IS - 20
M1 - 207201
ER -