Valence state of Ru at the Mn sites in Pr0.5Sr 0.5MnO3

J. S. Kim; B. H. Kim; D. C. Kim; M. G. Kim; A. Maignan; B. Raveau; Y. W. Park

doi:10.1238/Physica.Topical.115a00498

Valence state of Ru at the Mn sites in Pr0.5Sr 0.5MnO3

J. S. Kim
, B. H. Kim
, D. C. Kim
, M. G. Kim
, A. Maignan
, B. Raveau
, Y. W. Park

Research output: Contribution to journal › Conference article

3 Scopus citations

Abstract

The valence of Ru at the Mn sites in Pr_0.5Sr _0.5MnO₃ has been studied using Ru K- and L _III-edge x-ray absorption near edge structure (XANES) spectroscopy. In comparison with XANES of tetravalent and pentavalent ruthenates, it was found that the Mn-site doped Ru is mainly in tetravalent state with a small amount of pentavalent Ru. This result indicates that the change of carrier density with Ru doping is not sufficient to induce the drastic enhancement of ferromagnetism observed in transport properties of Ru-doped Pr_0.5Sr _0.5MnO3. The mixed valence state of doped Ru suggests that 4d orbitals of Ru are involved in electronic transport of the Mn ³⁺-O-Mn⁴⁺ network with the valence fluctuation Ru ⁵⁺ + Mn³⁺ Ru⁴⁺ + Mn⁴⁺. The prime role of Ru has been discussed in terms of Mn valence change and magnetic interactions between Mn and doped Ru ions. © Physica Scripta 2005.

Original language	English
Pages (from-to)	498-500
Number of pages	3
Journal	Physica Scripta
Volume	T115
DOIs	https://doi.org/10.1238/Physica.Topical.115a00498
State	Published - Dec 1 2005
Externally published	Yes

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@article{5ec21b5aaaa84acba98bbbc890ef6575,

title = "Valence state of Ru at the Mn sites in Pr0.5Sr 0.5MnO3",

abstract = "The valence of Ru at the Mn sites in Pr0.5Sr 0.5MnO3 has been studied using Ru K- and L III-edge x-ray absorption near edge structure (XANES) spectroscopy. In comparison with XANES of tetravalent and pentavalent ruthenates, it was found that the Mn-site doped Ru is mainly in tetravalent state with a small amount of pentavalent Ru. This result indicates that the change of carrier density with Ru doping is not sufficient to induce the drastic enhancement of ferromagnetism observed in transport properties of Ru-doped Pr0.5Sr 0.5MnO3. The mixed valence state of doped Ru suggests that 4d orbitals of Ru are involved in electronic transport of the Mn 3+-O-Mn4+ network with the valence fluctuation Ru 5+ + Mn3+ Ru4+ + Mn4+. The prime role of Ru has been discussed in terms of Mn valence change and magnetic interactions between Mn and doped Ru ions. {\textcopyright} Physica Scripta 2005.",

author = "Kim, \{J. S.\} and Kim, \{B. H.\} and Kim, \{D. C.\} and Kim, \{M. G.\} and A. Maignan and B. Raveau and Park, \{Y. W.\}",

year = "2005",

month = dec,

day = "1",

doi = "10.1238/Physica.Topical.115a00498",

language = "English",

volume = "T115",

pages = "498--500",

journal = "Physica Scripta",

issn = "0031-8949",

publisher = "Institute of Physics",

}

TY - JOUR

T1 - Valence state of Ru at the Mn sites in Pr0.5Sr 0.5MnO3

AU - Kim, J. S.

AU - Kim, B. H.

AU - Kim, D. C.

AU - Kim, M. G.

AU - Maignan, A.

AU - Raveau, B.

AU - Park, Y. W.

PY - 2005/12/1

Y1 - 2005/12/1

N2 - The valence of Ru at the Mn sites in Pr0.5Sr 0.5MnO3 has been studied using Ru K- and L III-edge x-ray absorption near edge structure (XANES) spectroscopy. In comparison with XANES of tetravalent and pentavalent ruthenates, it was found that the Mn-site doped Ru is mainly in tetravalent state with a small amount of pentavalent Ru. This result indicates that the change of carrier density with Ru doping is not sufficient to induce the drastic enhancement of ferromagnetism observed in transport properties of Ru-doped Pr0.5Sr 0.5MnO3. The mixed valence state of doped Ru suggests that 4d orbitals of Ru are involved in electronic transport of the Mn 3+-O-Mn4+ network with the valence fluctuation Ru 5+ + Mn3+ Ru4+ + Mn4+. The prime role of Ru has been discussed in terms of Mn valence change and magnetic interactions between Mn and doped Ru ions. © Physica Scripta 2005.

AB - The valence of Ru at the Mn sites in Pr0.5Sr 0.5MnO3 has been studied using Ru K- and L III-edge x-ray absorption near edge structure (XANES) spectroscopy. In comparison with XANES of tetravalent and pentavalent ruthenates, it was found that the Mn-site doped Ru is mainly in tetravalent state with a small amount of pentavalent Ru. This result indicates that the change of carrier density with Ru doping is not sufficient to induce the drastic enhancement of ferromagnetism observed in transport properties of Ru-doped Pr0.5Sr 0.5MnO3. The mixed valence state of doped Ru suggests that 4d orbitals of Ru are involved in electronic transport of the Mn 3+-O-Mn4+ network with the valence fluctuation Ru 5+ + Mn3+ Ru4+ + Mn4+. The prime role of Ru has been discussed in terms of Mn valence change and magnetic interactions between Mn and doped Ru ions. © Physica Scripta 2005.

UR - https://www.scopus.com/pages/publications/42149134817

U2 - 10.1238/Physica.Topical.115a00498

DO - 10.1238/Physica.Topical.115a00498

M3 - Conference article

SN - 0031-8949

VL - T115

SP - 498

EP - 500

JO - Physica Scripta

JF - Physica Scripta

ER -

Valence state of Ru at the Mn sites in Pr0.5Sr 0.5MnO3

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