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Titolo:
On phase transition of NH4H2PO4-type crystals by cluster variation method
Autore:
Ihara, N; Yoshida, S; Wada, K;
Indirizzi:
Hokkaido Univ, Div Phys, Grad Sch Sci, Sapporo, Hokkaido 0600810, Japan Hokkaido Univ Sapporo Hokkaido Japan 0600810 oro, Hokkaido 0600810, Japan
Titolo Testata:
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
fascicolo: 9, volume: 70, anno: 2001,
pagine: 2550 - 2558
SICI:
0031-9015(200109)70:9<2550:OPTONC>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Keywords:
NH4H2PO4 (ADP); anti-ferroelectrics; Ishibashi model; Cluster Variation Method (CVM); Natural Iteration Method (NIM); susceptibility;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Ihara, N Hokkaido Univ, Div Phys, Grad Sch Sci, Sapporo, Hokkaido 0600810,Japan Hokkaido Univ Sapporo Hokkaido Japan 0600810 aido 0600810, Japan
Citazione:
N. Ihara et al., "On phase transition of NH4H2PO4-type crystals by cluster variation method", J PHYS JPN, 70(9), 2001, pp. 2550-2558

Abstract

The cluster variation method (CVM) is applied to the Ishibashi model for ammonium dihydrogen phosphate, (NH4H2PO4) of a typical hydrogen bonded anti-ferroelectric crystal. The staggered and the uniform susceptibility withouthysteresis arc, calculated at equilibrium. On the other hand, by making use of the natural iteration method (NIM) for the CVM, hysteresis phenomena of uniform susceptibility versus temperature observed in experiments are well explained on the basis of local minimum in Landau type variational free energy. The polarization P curves against the uniform field are also calculated.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 01:48:58