Studies of the phase transitions in substitutionally disordred dielectrics by NMR-NQR

Autor:	R. Kind, M. Mohr, O. Liechti
Rok vydání:	1988
Předmět:	Phase transition Random field Spin glass Materials science Condensed matter physics Proton Dielectric Condensed Matter Physics Glass transition Polarization (electrochemistry) Condensed Matter::Disordered Systems and Neural Networks Electronic Optical and Magnetic Materials Solid solution
Zdroj:	Ferroelectrics. 78:87-94
ISSN:	1563-5112 0015-0193
DOI:	10.1080/00150198808215892
Popis:	The influence of substitutional disorder on the NMR-NQR line shape in crystals of solid solutions is analyzed and the results are used to investigate the phase transition behaviour in these systems. It is demonstrated that the Edwards-Anderson order parameter of the proton glass transition in the mixed crystal Rb0.44(ND4)0.56D2PO4 can be determined as a function of temperature by means of NMR. Due to the existence of random fields which couple linearly to the local random polarization the proton glass ordering sets in already well above the glass temperature TG 90K, i.e. already above room temperature.
Databáze:	OpenAIRE
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