High-temperature order-disorder transition and polaronic conductivity in PrBaCo2O5.48

被引：88

作者：

Streule, S ^{[1
]}

Podlesnyak, A

Sheptyakov, D

Pomjakushina, E

Stingaciu, M

Conder, K

Medarde, M

Patrakeev, MV

Leonidov, IA

Kozhevnikov, VL

Mesot, J

机构：

[1] Swiss Fed Inst Technol, Lab Neutron Scattering, CH-5232 Villigen, Switzerland

[2] Paul Scherrer Inst, Lab Dev & Methods, CH-5232 Villigen, Switzerland

[3] RAS, Inst Solid State Chem, Ekaterinburg 620219, Russia

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.73.094203

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Neutron powder diffraction and transport measurements have been used to investigate the PrBaCo2O5.48 compound between room temperature and 820 K. A structural phase transition, involving a rearrangement of oxygen vacancies, was found at T-OD=776 K. Across the transition the perovskite structure loses its vacancy ordering, and the crystal symmetry changes from orthorhombic Pmmm to tetragonal P4/mmm. The resisitivity measurements for temperatures above similar to 350 K yield high values of rho, indicating that the compound is rather semiconducting than metallic as usually accepted. A model in terms of thermally activated hole (polaronic) hopping is proposed.

引用

页数：5

共 34 条

[1] LOCAL-STRUCTURE AND OXIDE-ION MOTION IN DEFECTIVE PEROVSKITES [J].

ADLER, S ;

RUSSEK, S ;

REIMER, J ;

FENDORF, M ;

STACY, A ;

HUANG, QZ ;

SANTORO, A ;

LYNN, J ;

BALTISBERGER, J ;

WERNER, U .

SOLID STATE IONICS, 1994, 68 (3-4) :193-211

[2] Oxygen content determination in perovskite-type cobaltates [J].

Conder, K ;

Pomjakushina, E ;

Soldatov, A ;

Mitberg, E .

MATERIALS RESEARCH BULLETIN, 2005, 40 (02) :257-263

[3] Interplay of structural, magnetic and transport properties in the layered Co-based perovskite LnBaCo2O5 (Ln = Tb, Dy, Ho) [J].

Fauth, F ;

Suard, E ;

Caignaert, V ;

Domengès, B ;

Mirebeau, I ;

Keller, L .

EUROPEAN PHYSICAL JOURNAL B, 2001, 21 (02) :163-174

[4] High-resolution powder diffractometer HRPT for thermal neutrons at SINQ [J].

Fischer, P ;

Frey, G ;

Koch, M ;

Könnecke, M ;

Pomjakushin, V ;

Schefer, J ;

Thut, R ;

Schlumpf, N ;

Bürge, R ;

Greuter, U ;

Bondt, S ;

Berruyer, E .

PHYSICA B, 2000, 276 :146-147

[5] Selective spin-state switch and metal-insulator transition in GdBaCo2O5.5 -: art. no. 180405 [J].

Frontera, C ;

García-Muñoz, JL ;

Llobet, A ;

Aranda, MAG .

PHYSICAL REVIEW B, 2002, 65 (18) :1-4

[6] COEXISTENCE OF LOCALIZED AND ITINERANT D ELECTRONS [J].

GOODENOUGH, JB .

MATERIALS RESEARCH BULLETIN, 1971, 6 (10) :967-+

[7] A novel complex cobalt gallium oxide Ca2Co0.8Ga1.2O4.8:: Synthesis and high-temperature electron transport properties [J].

Istomin, SY ;

Antipov, EV ;

Svensson, G ;

Attfield, JP ;

Kozhevnikov, VL ;

Leonidov, IA ;

Patrakeev, MV ;

Mitberg, EB .

JOURNAL OF SOLID STATE CHEMISTRY, 2002, 167 (01) :196-202

[8] Anisotropic magnetic, magnetoresistance, and electrotransport properties of GdBaCo2O5.5 single crystals -: art. no. 214421 [J].

Khalyavin, DD ;

Barilo, SN ;

Shiryaev, SV ;

Bychkov, GL ;

Troyanchuk, IO ;

Furrer, A ;

Allenspach, P ;

Szymczak, H ;

Szymczak, R .

PHYSICAL REVIEW B, 2003, 67 (21)

[9] INFLUENCE OF ORDER-DISORDER TRANSITIONS ON OXYGEN PERMEABILITY THROUGH SELECTED NONSTOICHIOMETRIC PEROVSKITE-TYPE OXIDES [J].

KRUIDHOF, H ;

BOUWMEESTER, HJM ;

VONDOORN, RHE ;

BURGGRAAF, AJ .

SOLID STATE IONICS, 1993, 63-5 :816-822

[10] Structural and magnetic studies of ordered oxygen-deficient perovskites LnBaCo2O5+δ, closely related to the "112" structure [J].

Maignan, A ;

Martin, C ;

Pelloquin, D ;

Nguyen, N ;

Raveau, B .

JOURNAL OF SOLID STATE CHEMISTRY, 1999, 142 (02) :247-260

← 1 2 3 4 →