Stabilization of ferromagnetic ordering in cobaltite double perovskites of La2CoIrO6 and La2CoPtO6

Min Cheol Lee; C. H. Sohn; S. Y. Kim; K. D. Lee; C. J. Won; N. Hur; J. Y. Kim; Deok Yong Cho; T. W. Noh

doi:10.1088/0953-8984/27/33/336002

Stabilization of ferromagnetic ordering in cobaltite double perovskites of La₂CoIrO₆ and La₂CoPtO₆

Min Cheol Lee
, C. H. Sohn
, S. Y. Kim
, K. D. Lee
, C. J. Won
, N. Hur
, J. Y. Kim
, Deok Yong Cho^*
, T. W. Noh

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Journal article › peer-review

12 Scopus citations

Abstract

We investigated the local electronic structure and magnetic properties of the cobaltite double perovskites La₂CoIrO₆ and La₂CoPtO₆ using Co L_2,3-edge x-ray absorption spectroscopy and x-ray magnetic circular dichroism. Despite similarity in the local electronic structure (Co²⁺ high-spin states) as well as in the crystal structure (P2₁/n), only La₂CoIrO₆ exhibits substantial orbital and spin magnetic moments of Co²⁺, whereas they are much weaker in the case of La₂CoPtO₆. This composition dependence is consistent with the results of magnetization measurements. The details of the mechanism of ferromagnetic ordering in the Co²⁺ sublattice in La₂CoIrO₆ and the lack thereof in La₂CoPtO₆ are explained in terms of the orbital hybridization of the Co minority-spin t_2g state and the Ir/Pt _jeff = 1/2 state.

Original language	English
Article number	336002
Journal	Journal of Physics Condensed Matter
Volume	27
Issue number	33
DOIs	https://doi.org/10.1088/0953-8984/27/33/336002
State	Published - 2015.08.26

Keywords

Double perovskite
Ferromagnetism
X-ray magnetic circular dichroism

Quacquarelli Symonds(QS) Subject Topics

Materials Science
Physics & Astronomy

Access to Document

10.1088/0953-8984/27/33/336002

Cite this

@article{3e0bedb4c9074a40bc9a50405f8121f4,

title = "Stabilization of ferromagnetic ordering in cobaltite double perovskites of La2CoIrO6 and La2CoPtO6",

abstract = "We investigated the local electronic structure and magnetic properties of the cobaltite double perovskites La2CoIrO6 and La2CoPtO6 using Co L2,3-edge x-ray absorption spectroscopy and x-ray magnetic circular dichroism. Despite similarity in the local electronic structure (Co2+ high-spin states) as well as in the crystal structure (P21/n), only La2CoIrO6 exhibits substantial orbital and spin magnetic moments of Co2+, whereas they are much weaker in the case of La2CoPtO6. This composition dependence is consistent with the results of magnetization measurements. The details of the mechanism of ferromagnetic ordering in the Co2+ sublattice in La2CoIrO6 and the lack thereof in La2CoPtO6 are explained in terms of the orbital hybridization of the Co minority-spin t2g state and the Ir/Pt jeff = 1/2 state.",

keywords = "Double perovskite, Ferromagnetism, X-ray magnetic circular dichroism",

author = "Lee, \{Min Cheol\} and Sohn, \{C. H.\} and Kim, \{S. Y.\} and Lee, \{K. D.\} and Won, \{C. J.\} and N. Hur and Kim, \{J. Y.\} and Cho, \{Deok Yong\} and Noh, \{T. W.\}",

note = "Publisher Copyright: {\textcopyright} 2015 IOP Publishing Ltd.",

year = "2015",

month = aug,

day = "26",

doi = "10.1088/0953-8984/27/33/336002",

language = "English",

volume = "27",

journal = "Journal of Physics Condensed Matter",

issn = "0953-8984",

number = "33",

}

TY - JOUR

T1 - Stabilization of ferromagnetic ordering in cobaltite double perovskites of La2CoIrO6 and La2CoPtO6

AU - Lee, Min Cheol

AU - Sohn, C. H.

AU - Kim, S. Y.

AU - Lee, K. D.

AU - Won, C. J.

AU - Hur, N.

AU - Kim, J. Y.

AU - Cho, Deok Yong

AU - Noh, T. W.

PY - 2015/8/26

Y1 - 2015/8/26

N2 - We investigated the local electronic structure and magnetic properties of the cobaltite double perovskites La2CoIrO6 and La2CoPtO6 using Co L2,3-edge x-ray absorption spectroscopy and x-ray magnetic circular dichroism. Despite similarity in the local electronic structure (Co2+ high-spin states) as well as in the crystal structure (P21/n), only La2CoIrO6 exhibits substantial orbital and spin magnetic moments of Co2+, whereas they are much weaker in the case of La2CoPtO6. This composition dependence is consistent with the results of magnetization measurements. The details of the mechanism of ferromagnetic ordering in the Co2+ sublattice in La2CoIrO6 and the lack thereof in La2CoPtO6 are explained in terms of the orbital hybridization of the Co minority-spin t2g state and the Ir/Pt jeff = 1/2 state.

AB - We investigated the local electronic structure and magnetic properties of the cobaltite double perovskites La2CoIrO6 and La2CoPtO6 using Co L2,3-edge x-ray absorption spectroscopy and x-ray magnetic circular dichroism. Despite similarity in the local electronic structure (Co2+ high-spin states) as well as in the crystal structure (P21/n), only La2CoIrO6 exhibits substantial orbital and spin magnetic moments of Co2+, whereas they are much weaker in the case of La2CoPtO6. This composition dependence is consistent with the results of magnetization measurements. The details of the mechanism of ferromagnetic ordering in the Co2+ sublattice in La2CoIrO6 and the lack thereof in La2CoPtO6 are explained in terms of the orbital hybridization of the Co minority-spin t2g state and the Ir/Pt jeff = 1/2 state.

KW - Double perovskite

KW - Ferromagnetism

KW - X-ray magnetic circular dichroism

UR - https://www.scopus.com/pages/publications/84938878227

U2 - 10.1088/0953-8984/27/33/336002

DO - 10.1088/0953-8984/27/33/336002

M3 - Journal article

AN - SCOPUS:84938878227

SN - 0953-8984

VL - 27

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

IS - 33

M1 - 336002

ER -