Ferroelastic phase transitions and anelastic dissipation in the LaAlO3-PrAlO3 solid solution series

被引：21

作者：

Thomson, R. I. ^{[1
,2
]}

Rawson, J. M. ^{[2
]}

Howard, C. J. ^{[3
]}

Turczynski, S. ^{[4
]}

Pawlak, D. A. ^{[4
]}

Lukasiewicz, T. ^{[4
]}

Carpenter, M. A. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England

[2] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

[3] Univ Newcastle, Sch Engn, Callaghan, NSW 2308, Australia

[4] Inst Elect Mat Technol, PL-01919 Warsaw, Poland

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 21期

基金：

英国自然环境研究理事会;

关键词：

THIN-FILMS; EPITAXIAL-GROWTH; LOW-TEMPERATURE; ELASTIC-MODULI; PRALO3; PEROVSKITE; ANOMALIES; FIELD;

D O I：

10.1103/PhysRevB.82.214111

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Resonant ultrasound spectroscopy has been used on single-crystal samples to observe pseudoproper ferroelastic softening across the (La,Pr)AlO3 solid solution. It is suggested that softening is due to the presence of an intrinsic zone-center instability in addition to the small Jahn-Teller stabilization expected for Pr3+. Softening increases as smaller Pr3+ ions are substituted for larger La3+ which is attributed to a simple size effect as well as the possibility of bilinear coupling of the intrinsic instability with the weak Jahn-Teller effect. Superattenuation is observed above 600 K for all samples, which is consistent with twin wall related dissipation behavior seen in other perovskites with octahedral tilting. Superattenuation is also observed in the low-temperature monoclinic phase, implying a high mobility also for the monoclinic twin walls.

引用

页数：9

共 35 条

[1] [Anonymous], 1988, International series of monographs on physics
[2] Ground states, excited states, and metal-ligand bonding in rare earth hexachloro complexes: A DFT-based ligand field study
Atanasov, M
Daul, C
Gudel, HU
Wesolowski, TA
Zbiri, M
[J]. INORGANIC CHEMISTRY, 2005, 44 (08) : 2954 - 2963
[3] COOPERATIVE JAHN-TELLER PHASE-TRANSITION IN PRALO3
BIRGENEAU, RJ
KJEMS, JK
SHIRANE, G
VANUITER.LG
[J]. PHYSICAL REVIEW B, 1974, 10 (06) : 2512 - 2534
[4] Pseudoproper ferroelastic softening behaviour and dynamic microstructure of monoclinic PrAlO3 perovskite
Carpenter, M. A.
Wiltshire, E. C.
Howard, C. J.
Thomson, R. I.
Turczynski, S.
Pawlak, D. A.
Lukasiewicz, T.
[J]. PHASE TRANSITIONS, 2010, 83 (09) : 703 - 713
[5] Elastic relaxations associated with the Pm(3)over-barm-R(3)over-barc transition in LaAlO3: III. Superattenuation of acoustic resonances
Carpenter, M. A.
Buckley, A.
Taylor, P. A.
Darling, T. W.
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2010, 22 (03)
[6] Strain mechanism for order-parameter coupling through successive phase transitions in PrAlO3 -: art. no. 024118
Carpenter, MA
Howard, CJ
Kennedy, BJ
Knight, KS
[J]. PHYSICAL REVIEW B, 2005, 72 (02):
[7] Carpenter MA, 1998, EUR J MINERAL, V10, P693
[8] Characteristic length scale for strain fields around impurity cations in perovskites
Carpenter, Michael A.
McKnight, Ruth E. A.
Howard, Christopher J.
Zhou, Qingdi
Kennedy, Brendan J.
Knight, Kevin S.
[J]. PHYSICAL REVIEW B, 2009, 80 (21):
[9] Symmetry rules and strain/order-parameter relationships for coupling between octahedral tilting and cooperative Jahn-Teller transitions in ABX3 perovskites. II. Application
Carpenter, Michael A.
Howard, Christopher J.
[J]. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS, 2009, 65 : 147 - 159
[10] Cotton S., 2006, LANTHANIDE ACTINIDE

← 1 2 3 4 →