New phase transition studied by proton magnetic resonance in a [N(CH3)(4)](2)CuCl4 single crystal

Authors
Lim, AR Hong, KS Jeong, SY
Citation
Ar. Lim et al., New phase transition studied by proton magnetic resonance in a [N(CH3)(4)](2)CuCl4 single crystal, SOL ST COMM, 114(6), 2000, pp. 321-324
Citations number
12
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
114
Issue
6
Year of publication
2000
Pages
321 - 324
Database
ISI
SICI code
0038-1098(2000)114:6<321:NPTSBP>2.0.ZU;2-M
Abstract
The proton NMR line width and spin-lattice relaxation rate in a [N(CH3)(4)] (2)CuCl4 Single crystal have been investigated in the temperature range of 140-340 K. A large discontinuity in the curve of the spin-lattice relaxatio n rate shows near 200 K: this curve corresponds to a new phase transition. The activation energies were determined at each phase from the spin-lattice relaxation times. The large change in the activation energy at 200 K indic ates that the N(CH3)(4) groups are significantly affected during this trans ition. (C) 2000 Published by Elsevier Science Ltd. All rights reserved.