EFFECTS OF LATTICE DEFECTS ON THE PHASE TRANSITIONS OF BETAINE CALCIUM CHLORIDE DIHYDRATE

被引：12

作者：

Le Maire, Michel ^{[1
]}

Ayala, Agustin Lopez ^{[1
]}

Schaack, Gerhard ^{[1
]}

Kloepperpieper, Axel ^{[2
]}

Metz, Hendrik ^{[3
]}

机构：

[1] Univ Wurzburg, Inst Phys, D-97074 Wurzburg, Germany

[2] Univ Saarlandes, Fachbereich Phys, D-66123 Saarbrucken, Germany

[3] Univ Leipzig, Sekt Phys, D-04103 Leipzig, Germany

来源：

FERROELECTRICS | 1994年 / 155卷

关键词：

D O I：

10.1080/00150199408007529

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the effects of Br and Mn impurities and gamma-irradiation defects on the phase transition sequence of BCCD using dielectric and Raman spectroscopic measurements at hydrostatic pressures p < 420 MPa and temperatures 20 K < T < 250 K. The ( T, p)-phase diagrams of 5% Mn doped BCCD and three gamma-irradiated BCCD crystals have been determined and compared to those of 2%, 7% and 28% Br doped BCCD. We have localized the incommensurate phases and obtained the modulations delta of the commensurate phases of the doped crystals and an irradiated one by Raman spectroscopy. The effects of the different types of defects on the phase transition sequence of BCCD are discussed. A freezing process in the dipole system appears to be present at least in some of the studied substances.

引用

页码：335 / 340

页数：6

共 50 条

[1] Effects of lattice defects on the phase transitions of betaine calcium chloride dihydrate
Le Maire, Michel
Ayala, Agustin Lopez
Schaack, Gerhard
Klopperpieper, Axel
Metz, Hendrik
Ferroelectrics, 1994, 155 (1 -4 pt 5) : 335 - 340
[2] STRUCTURAL PHASE-TRANSITIONS IN BETAINE CALCIUM-CHLORIDE DIHYDRATE
DVORAK, V
PHASE TRANSITIONS, 1991, 31 (1-4) : 23 - 28
[3] PHASE-TRANSITIONS, CRITICAL DIELECTRIC PHENOMENA AND HYSTERESIS EFFECTS IN BETAINE CALCIUM-CHLORIDE DIHYDRATE
ROTHER, HJ
ALBERS, J
KLOPPERPIEPER, A
FERROELECTRICS, 1984, 54 (1-4) : 447 - 450
[4] PHASE-TRANSITIONS IN MIXED-CRYSTALS OF BETAINE CALCIUM-CHLORIDE DIHYDRATE AND BETAINE CALCIUM BROMIDE DIHYDRATE (BCC1-XBXD)
MAEDA, M
SUZUKI, I
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1993, 62 (04) : 1139 - 1142
[5] Phason dispersion in the incommensurate phase of betaine calcium chloride dihydrate
Hlinka, J
Quilichini, M
Currat, R
Legrand, JF
JOURNAL OF PHYSICS-CONDENSED MATTER, 1997, 9 (07) : 1461 - 1475
[6] Anisotropic effects of bromine substitution in betaine calcium chloride dihydrate
Vieira, LG
Ribeiro, JL
Chaves, MR
Almeida, A
Hernandez, O
Quilichini, M
Klöpperpieper, A
FERROELECTRICS, 2004, 302 : 397 - 399
[7] LIBRATIONAL LATTICE MODULATION IN INCOMMENSURATE PHASES OF BETAINE CALCIUM-CHLORIDE DIHYDRATE
FUJIMOTO, M
KOTAKE, Y
JOURNAL OF CHEMICAL PHYSICS, 1989, 91 (11): : 6671 - 6676
[8] The phase transition sequence in betaine calcium chloride dihydrate by adiabatic calorimetry
Igartua, J. M.
Ruiz-Larrea, I.
Breczewski, T.
Lopez-Echarri, A.
PHASE TRANSITIONS, 1994, 50 (04) : 227 - 237
[9] ARE 2 COMPLEX-ORDER PARAMETERS ACTIVE IN PHASE-TRANSITIONS OF BETAINE CALCIUM-CHLORIDE DIHYDRATE
WILHELM, H
UNRUH, HG
ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 1991, 195 (1-2): : 75 - 83
[10] DIELECTRIC ANOMALIES AT THE LOCK-IN TRANSITIONS IN DEUTERATED BETAINE CALCIUM-CHLORIDE DIHYDRATE
CHAVES, MR
ALMEIDA, A
RIBEIRO, JL
CARVALHO, PS
TOLEDANO, JC
SCHNECK, J
KIAT, JM
SCHWARZ, W
MUSER, HE
KLOPPERPIEPER, A
ALBERS, J
FERROELECTRICS, 1992, 125 (1-4) : 81 - 86

← 1 2 3 4 5 →