Low-temperature heat capacity of triangle antiferromagnetic molecular clusters K{sub 12}[(VO){sub 3}(SbW{sub 9}O{sub 33}){sub 2}].15H{sub 2}O and K{sub 12}[(VO){sub 3}(BiW{sub 9}O{sub 33}){sub 2}].29H{sub 2}O

Journal Article · Mon Jun 15 00:00:00 EDT 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.03.018· OSTI ID:21370437

Kohama, Yoshimitsu ^[1]; Kawaji, Hitoshi; Atake, Tooru ^[1]; Fukaya, Keisuke; Yamase, Toshihiro ^[2]

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1. Materials and Structures Laboratory, Tokyo Institute of Technology, R3-7, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503 (Japan)
2. Chemical Resources Laboratory, Tokyo Institute of Technology, R1-21, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503 (Japan)

Energy level diagrams have been determined for two molecular clusters, K{sub 12}[(VO){sub 3}(SbW{sub 9}O{sub 33}){sub 2}].15H{sub 2}O and K{sub 12}[(VO){sub 3}(BiW{sub 9}O{sub 33}){sub 2}].29H{sub 2}O, by low-temperature heat capacity measurements down to 85 mK under magnetic field strengths up to 9 T. Both compounds exhibit a broad heat capacity peak dependent upon the magnetic field, which can be explained by the thermal excitation in the magnetic energy levels. A detailed analysis based on the numerical calculation reveals that the spin-spin interaction between the V{sup 4+} ions includes a Dzyaloshinskii-Moriya interaction. - Graphical abstract: Temperature dependence of heat capacity for K{sub 12}[(VO){sub 3}(SbW{sub 9}O{sub 33}){sub 2}].15H{sub 2}O below 5 K. This is well described by the model with a doublet ground state.

• OSTI ID: 21370437
• Journal Information: Journal of Solid State Chemistry, Vol. 182, Issue 6; Other Information: DOI: 10.1016/j.jssc.2009.03.018; PII: S0022-4596(09)00128-5; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
BISMUTH COMPOUNDS
DIAGRAMS
J-J COUPLING
MAGNETIC FIELDS
MAGNETS
MOLECULAR CLUSTERS
POTASSIUM VANADATES
SPECIFIC HEAT
TEMPERATURE RANGE 0000-0013 K
TUNGSTEN COMPOUNDS
VANADIUM IONS
ALKALI METAL COMPOUNDS
CHARGED PARTICLES
COUPLING
EQUIPMENT
INFORMATION
INTERMEDIATE COUPLING
IONS
MAGNETISM
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POTASSIUM COMPOUNDS
REFRACTORY METAL COMPOUNDS
TEMPERATURE RANGE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
VANADATES
VANADIUM COMPOUNDS