Spin-state ordered clusters in the perovskite NdBaCo2O5.47 -: art. no. 184421

被引：112
作者：
Fauth, F
Suard, E
Caignaert, V
Mirebeau, I
机构：
[1] European Synchrotron Radiat Facil, F-38043 Grenoble, France
[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France
[3] Inst Sci Mat & Rayonnement, Lab CRISMAT, F-14050 Caen, France
[4] CEA Saclay, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France
来源：
PHYSICAL REVIEW B | 2002年 / 66卷 / 18期
关键词：
D O I：
10.1103/PhysRevB.66.184421
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
NdBaCo2O5.47 cobaltite has been investigated using neutron and synchrotron powder diffraction. At T(MI)similar to360 K, the compound exhibits an associated metal-insulator and spin-state transition commonly observed in these systems. At T(N)similar to275 K, the IS-Co3+ species order in a AFM G-type structure. At T(SSO)similar to230 K, the AFM G-type volume fraction is gradually transformed into spin-state ordered clusters having a distinct magnetic structure. These clusters result from a selective IS-Co3+ (t(2g)(5)e(g)(1)) to LS-Co-III (t(2g)(6)e(g)(0)) crossover and the ordering of the diamagnetic ions over similar to350 Angstrom correlation lengths. The same electronic phase segregation is observed in TbBaCo2O5.46 and seems to occur only for a narrow range of oxygen stoichiometry.
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页码：1 / 5
页数：5
相关论文
共 17 条
[1]   Oxygen nonstoichiometry, structures, and physical properties of YBaCo2O5+x (0.00 ≤ x ≤ 0.52) [J].
Akahoshi, D ;
Ueda, Y .
JOURNAL OF SOLID STATE CHEMISTRY, 2001, 156 (02) :355-363
[2]   Intermediate spin state of Co3+ and Co4+ ions in La0.5Ba0.5CoO3 evidenced by Jahn-Teller distortions -: art. no. 060401 [J].
Fauth, F ;
Suard, E ;
Caignaert, V .
PHYSICAL REVIEW B, 2002, 65 (06)
[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]  
FAUTH F, UNPUB
[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]   Metal-insulator transitions [J].
Imada, M ;
Fujimori, A ;
Tokura, Y .
REVIEWS OF MODERN PHYSICS, 1998, 70 (04) :1039-1263
[7]   SUPEREXCHANGE INTERACTION AND SYMMETRY PROPERTIES OF ELECTRON ORBITALS [J].
KANAMORI, J .
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1959, 10 (2-3) :87-98
[8]   Reentrant paramagnetic behavior and spin-state transition in the layered cobalt oxide GdBaCo2O5+δ [J].
Kim, WS ;
Chi, EO ;
Choi, HS ;
Hur, NH ;
Oh, SJ ;
Ri, HC .
SOLID STATE COMMUNICATIONS, 2000, 116 (11) :609-614
[9]   Intermediate-spin state and properties of LaCoO3 [J].
Korotin, MA ;
Ezhov, SY ;
Solovyev, IV ;
Anisimov, VI ;
Khomskii, DI ;
Sawatzky, GA .
PHYSICAL REVIEW B, 1996, 54 (08) :5309-5316
[10]   Structural change at metal-insulator transition of Tb2Ba2Co4O11 [J].
Kusuya, H ;
Machida, A ;
Moritomo, Y ;
Kato, K ;
Nishibori, E ;
Takata, M ;
Sakata, M ;
Nakamura, A .
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2001, 70 (12) :3577-3580
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