Published November 1997
| Version v1
Journal article
Phase transitions in improper ferroelectric Tb2(MoO4)3 crystals from calorimetric data
Creators
- 1. Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Moscow (Russian Federation)
- 2. Univ. Khokkajdo, Khokkajdo (Japan)
- 3. RAN, Inst. Tverdogo Tela, Chernogolovka (Russian Federation)
Description
Heat capacity of terbium molybdate improper ferroelectric was measured within 85-560 K temperature range. Two anomalous, one at ferroelectric phase transition under TC = 429.79 K and, the other - near 271 K were determined. In terms of phenomenological mode taking account of the six-th and eight-th degree members the additional anomaly is interpreted as beyond critical behaviour of isostructural ordering in molybdates
Abstract (Russian)
Теплоемкость несобственного сегнетоэлектрика молибдата тербия измерена в широком интервале температур 85-560 К. Выявлено две аномалии - одна при сегнетоэлектрическом фазовом переходе при ТC = 429.79 К и вторая в окрестности 271 К. В рамках феноменологической модели, учитывающей члены шестой и восьмой степени, дополнительная аномалия интерпретирована как закритическое поведение изоструктурного упорядочения в молибдатахAdditional details
Additional titles
- Original title (Russian)
- Фазовые переходы в кристаллах несобственного сегнетоэлектрика Тб
Publishing Information
- Journal Title
- Kristallografiya
- Journal Volume
- 42
- Journal Issue
- 6
- Journal Page Range
- p. 1066-1068
- ISSN
- 0023-4761
- CODEN
- KRISAJ
INIS
- Country of Publication
- Russian Federation
- Country of Input or Organization
- Russian Federation
- INIS RN
- 31064894
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CALORIMETRY; CRYSTAL-PHASE TRANSFORMATIONS; FERROELECTRIC MATERIALS; MOLYBDATES; SPECIFIC HEAT; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K; TEMPERATURE RANGE 0400-1000 K; TERBIUM COMPOUNDS
- Descriptors DEC
- DIELECTRIC MATERIALS; MATERIALS; MOLYBDENUM COMPOUNDS; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; REFRACTORY METAL COMPOUNDS; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Notes
- 8 refs., 2 figs.