Magnetic and Dielectric Properties of RbCoBr3 Inspected from Nonmagnetic Impurity Effect
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- Nishiwaki Yoichi
- Department of Physics, Tokyo Women’s Medical University
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- Imamura Hideyo
- Department of Physics, Tokyo Institute of Technology
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- Mitsui Toshiharu
- Faculty of Pharmaceutical Sciences, Teikyo University
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- Tanaka Hidekazu
- Department of Physics, Tokyo Institute of Technology
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- Iio Katsunori
- Department of Physics, Tokyo Institute of Technology
Bibliographic Information
- Other Title
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- Magnetic and Dielectric Properties of RbCoBr<sub>3</sub> Inspected from Nonmagnetic Impurity Effect
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Abstract
Through magnetic and dielectric measurements, a simultaneous phase transition of spin and lattice systems observed previously at 37.2 K of RbCoBr3 have been investigated by doping with nonmagnetic Mg impurities. A mutual reduction in the ferroelectric Curie temperature TC and the Néel temperature TN due to the enhancement of Mg doping confirms the occurrence of the synergistic ordering of both. A broad peak of the real part of dielectric constant along the c axis, ε′c(T), at approximately 32 K of the pure system splits into two sharp peaks in mixed systems. This suggests the presence of successive structural phase transitions at around this temperature. A probable sequence of crystal and magnetic structures was discussed for the successive phase transitions of RbCo1−xMgxBr3. The interplay between the spin and lattice variables of RbCoBr3 was interpreted by taking account of spin-dependent polarizability and spin-dependent spontaneous polarization. A dielectric anomaly observed at 9.0 K in RbCoBr3, where ε′c(T) has a sharp peak, was ascribed to the occurrence of another structural transition.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 75 (9), 094702-, 2006
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282679167261184
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- NII Article ID
- 110004789073
- 210000106318
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- NII Book ID
- AA00704814
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- BIBCODE
- 2006JPSJ...75i4702N
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 8055356
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed