Transport properties and oxygen isotope effect in layered cobaltites RBaCo2O5+x

K. Conder; A. Podlesnyak; E. Pomjakushina; V. Pomjakushin; M. Stingaciu; A. E. Karkin

doi:10.1016/j.jmmm.2006.10.487

Transport properties and oxygen isotope effect in layered cobaltites RBaCo₂O_5+x

K. Conder, A. Podlesnyak, E. Pomjakushina, V. Pomjakushin, M. Stingaciu, A. E. Karkin

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

In the RBaCo₂O_5+x (R=rare earth) structure cobalt cations exist in two coordination environments-pyramidal CoO₅ (Co2) and octahedral CoO₆ (Co1). In compounds with x≈0.5 a metal-insulator (MI) transition is observed. We have found that this transition is affected by an oxygen isotope substitution and is accompanied by structural changes and melting of the orbital ordering. Measurements of transport anisotropy in single crystal of TbBaCo₂O_5.5 are presented.

Original language	English
Pages (from-to)	907-909
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 1
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.487
State	Published - Mar 2007
Externally published	Yes

Funding

We are indebted to the Swiss National Science Foundation for financial support through grant SCOPES IB7320-110859/1 and NCCR MaNEP project.

Keywords

Cobaltites
Metal-insulator transition
Oxygen isotope effect

Access to Document

10.1016/j.jmmm.2006.10.487

Cite this

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title = "Transport properties and oxygen isotope effect in layered cobaltites RBaCo2O5+x",

abstract = "In the RBaCo2O5+x (R=rare earth) structure cobalt cations exist in two coordination environments-pyramidal CoO5 (Co2) and octahedral CoO6 (Co1). In compounds with x≈0.5 a metal-insulator (MI) transition is observed. We have found that this transition is affected by an oxygen isotope substitution and is accompanied by structural changes and melting of the orbital ordering. Measurements of transport anisotropy in single crystal of TbBaCo2O5.5 are presented.",

keywords = "Cobaltites, Metal-insulator transition, Oxygen isotope effect",

author = "K. Conder and A. Podlesnyak and E. Pomjakushina and V. Pomjakushin and M. Stingaciu and Karkin, \{A. E.\}",

year = "2007",

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doi = "10.1016/j.jmmm.2006.10.487",

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journal = "Journal of Magnetism and Magnetic Materials",

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T1 - Transport properties and oxygen isotope effect in layered cobaltites RBaCo2O5+x

AU - Conder, K.

AU - Podlesnyak, A.

AU - Pomjakushina, E.

AU - Pomjakushin, V.

AU - Stingaciu, M.

AU - Karkin, A. E.

PY - 2007/3

Y1 - 2007/3

N2 - In the RBaCo2O5+x (R=rare earth) structure cobalt cations exist in two coordination environments-pyramidal CoO5 (Co2) and octahedral CoO6 (Co1). In compounds with x≈0.5 a metal-insulator (MI) transition is observed. We have found that this transition is affected by an oxygen isotope substitution and is accompanied by structural changes and melting of the orbital ordering. Measurements of transport anisotropy in single crystal of TbBaCo2O5.5 are presented.

AB - In the RBaCo2O5+x (R=rare earth) structure cobalt cations exist in two coordination environments-pyramidal CoO5 (Co2) and octahedral CoO6 (Co1). In compounds with x≈0.5 a metal-insulator (MI) transition is observed. We have found that this transition is affected by an oxygen isotope substitution and is accompanied by structural changes and melting of the orbital ordering. Measurements of transport anisotropy in single crystal of TbBaCo2O5.5 are presented.

KW - Cobaltites

KW - Metal-insulator transition

KW - Oxygen isotope effect

UR - https://www.scopus.com/pages/publications/33847402300

U2 - 10.1016/j.jmmm.2006.10.487

DO - 10.1016/j.jmmm.2006.10.487

M3 - Article

AN - SCOPUS:33847402300

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SP - 907

EP - 909

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 2 SUPPL. PART 1

ER -