Thermal properties of layered cobaltites RBaCo2O5.5 (R = Y, Gd, and Tb)

被引：13

作者：

Wieckowski, J. ^{[1
]}

Gutowska, M. U. ^{[1
]}

Szewczyk, A. ^{[1
]}

Lewinska, S. ^{[1
]}

Conder, K. ^{[2
]}

Pomjakushina, E. ^{[2
]}

Gnezdilov, V. P. ^{[3
]}

Gnatchenko, S. L. ^{[3
]}

机构：

[1] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

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

[3] Natl Acad Sci Ukraine, BI Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 05期

关键词：

MAGNETIC-PROPERTIES; GDBACO2O5.5; TRANSITION; TRANSPORT; FIELD; HEAT;

D O I：

10.1103/PhysRevB.86.054404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Specific heat studies of a series of RBaCo2O5.5 (R = Y, Gd, and Tb) layered cobaltites are reported. They were aimed at explaining an influence of different rare-earth ions on thermal properties of these compounds and at studying phase transitions appearing in them. The studies were performed over the temperature range from 3 to 395 K, in the magnetic field ranging from 0 to 9 T. Anomalies accompanying different phase transitions were analyzed. Based on the performed supplementary Raman scattering measurements, frequencies of main optical phonon modes were determined and used for evaluation of the lattice contribution to the specific heat. Lattice, magnon, and Schottky contributions to the specific heat were separated and described theoretically. As a result, the molecular field corresponding to the R-Co exchange interactions was estimated to be similar to 1 T.

引用

页数：9

共 50 条

[1] Microscopic evidence of spin state order and spin state phase separation in layered cobaltites RBaCo2O5.5 with R = Y, Tb, Dy, and Ho
Luetkens, H.
Stingaciu, M.
Pashkevich, Yu. G.
Conder, K.
Pomjakushina, E.
Gusev, A. A.
Lamonova, K. V.
Lemmens, P.
Klauss, H. -H.
PHYSICAL REVIEW LETTERS, 2008, 101 (01)
[2] Metal-insulator transition in double cobaltites RBaCo2O5.5 (R = Eu, Gd): Specific features of their optical properties
A. A. Makhnev
L. V. Nomerovannaya
S. V. Strel’tsov
V. I. Anisimov
S. N. Barilo
S. V. Shiryaev
Physics of the Solid State, 2009, 51 : 525 - 531
[3] Metal-insulator transition in double cobaltites RBaCo2O5.5 (R = Eu, Gd): Specific features of their optical properties
Makhnev, A. A.
Nomerovannaya, L. V.
Strel'tsov, S. V.
Anisimov, V. I.
Barilo, S. N.
Shiryaev, S. V.
PHYSICS OF THE SOLID STATE, 2009, 51 (03) : 525 - 531
[4] Oxygen isotope effect on metal-insulator transition in layered cobaltites RBaCo2O5.5 (R = Pr, Dy, Ho and Y)
Conder, K
Pomjakushina, E
Pomjakushin, V
Stingaciu, M
Streule, S
Podlesnyak, A
JOURNAL OF PHYSICS-CONDENSED MATTER, 2005, 17 (37) : 5813 - 5820
[5] Magnetic ground state of RBaCo2O5.5 (R=Tb, Gd) compounds -: art. no. 094436
Zhang, QF
Zhang, WY
PHYSICAL REVIEW B, 2003, 67 (09)
[6] Hall resistivity of RBaCo2O5.5 (R = Y and rare earth elements)
Fujita, Toshiaki
Soda, Minoru
Sato, Masatoshi
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 310 (02) : E234 - E236
[7] X - Ray Spectroscopic and Magnetic Studies of RBaCo2O5.5 R = Pr, Nd, Sm, Gd and Y
Ganorkar, S.
Priolkar, K. R.
Sarode, P. R.
Emura, S.
INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2015), 2016, 1728
[8] Superstructures in RBaCo2O5.5 (R=Nd, Tb) as seen from reciprocal space mapping
Chernyshov, Dmitry
Pomjakushina, Ekaterina
Pomjakushin, Vladimir
Dmitriev, Vladimir
ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES, 2008, 64 : C518 - C519
[9] Ab initio cluster calculations of Co3+ spin states in RBaCo2O5.5 (R=Ho, Gd)
Siurakshina, L.
Paulus, B.
Yushankhai, V.
EUROPEAN PHYSICAL JOURNAL B, 2008, 63 (04): : 445 - 450
[10] Ab initio cluster calculations of Co3+ spin states in RBaCo2O5.5 (R=Ho, Gd)
L. Siurakshina
B. Paulus
V. Yushankhai
The European Physical Journal B, 2008, 63 : 445 - 450

← 1 2 3 4 5 →