<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Ru</mml:mi><mml:mtext>−</mml:mtext><mml:mi mathvariant="normal">O</mml:mi></mml:mrow></mml:math>orbital hybridization and orbital occupation in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">SrRuO</mml:mi></mml:mrow><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>: A magnetic Compton-profile study

Hiraoka, Nozomu; Itou, M.; Deb, Aniruddha; Sakurai, Y.; Kakutani, Yukinobu; Koizumi, Akira; Sakai, Nobuhiko; Uzuhara, Shinji; Miyaki, Satoru; Koizumi, Hiroyasu; Makoshi, Kenji; Kikugawa, Naoki; Maeno, Y.

doi:10.1103/physrevb.70.054420

Cited by 15 publications

(12 citation statements)

References 39 publications

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“…J mag ͑p z ͒ is the one-dimensional projection of the spin-polarized electron momentum density given by J mag ͑p z ͒ = ͵͵ ͓n↑͑p͒ − n↓͑p͔͒dp x dp y , where n ↑ ͑p͒ and n ↓ ͑p͒ are the momentum densities of the majority and minority spin bands, respectively, and the area under J mag ͑p z ͒ is equal to the total spin moment per f.u. [17][18][19][20] The magnetic moment of 0.92 B / f.u. was assigned to the experimental magnetic Compton profile ͑MCP͒ in comparison with the MCP of standard Fe metal.…”

Section: Magnetization Measurementsmentioning

confidence: 99%

Crystallographic and magnetic properties of the mixed-valence oxidesCaRu1−xMnxO3

et al. 2008

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The crystallographic and magnetic properties of CaRu 1−x Mn x O 3 ͑0 Յ x Յ 1.0͒ were investigated in detail by x-ray powder diffraction, magnetization, and magnetic Compton scattering measurements. The lattice parameters show considerable deviation from Vegard's law. Ferromagnetism appears at a relatively large Mn concentration ͑x Ն 0.2͒, and the magnetization and the Curie temperature have a maximum at a Mn content near x = 0.7. The magnetic Compton scattering measurement revealed that Mn makes a dominant contribution to the magnetization and the Mn moment is antiparallel to the Ru moment, which is induced by Mn doping. The anomalous change in the unit cell volume and the occurrence of ferromagnetism were discussed on the basis of the mixed-valence model of Mn 3+ , Mn 4+ , Ru 4+ , and Ru 5+ ions. The Mn-composition dependence of the spontaneous magnetization was explained semiquantitatively assuming ͑1͒ ferromagnetic coupling between Mn 3+ and Mn 4+ ions, ͑2͒ antiferromagnetic coupling between Ru 5+ and Mn ions, and ͑3͒ the theoretical spin moments of Mn 3+ , Mn 4+ , and Ru 5+ . The ferromagnetic interaction between Mn 3+ and Mn 4+ ions seems to make a dominant contribution to the Curie temperature. The CaRu 1−x Mn x O 3 system is considered to be a ferrimagnet induced through competition between the ferromagnetic interaction between Mn ions and the antiferromagnetic interaction between Ru 5+ and Mn ions.

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Section: Magnetization Measurementsmentioning

confidence: 99%

Crystallographic and magnetic properties of the mixed-valence oxidesCaRu1−xMnxO3

et al. 2008

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“…An ab initio restricted Hartree-Fock (RHF) molecular orbital calculation was performed for RuO 6 and TO 6 clusters using the GAMESS program [4] so as to obtain the theoretical profiles of the Ru 4d and the T 3d. The structure parameters determined by the present XRD were used for the calculation.…”

Section: Experiments and Calculationmentioning

confidence: 99%

The magnetic Compton scattering for the strongly correlated electron system of orthorhombic perovskite ruthenates CaRu1T O3 (T=Ti, Mn, Fe, Ni)

Mizusaki

Okada

Taniguchi

et al. 2007

Journal of Magnetism and Magnetic Materials

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“…The electronic heat capacity 9,25 shows that the effective mass is enhanced ͑m * Ϸ 3m e ͒, consistent with SrRuO 3 being on the border of a Mott-Hubbard transition, 26,27 though this interpretation has been questioned. 28 Hybridization of the ruthenium t 2g orbitals and the oxygen 2p orbitals 29 is important in this system, and it has been pointed out that the nature of the hybridization is controlled by the orbital orientation of the t 2g electrons in such a way as to be able to explain non-Fermi liquidlike features in the optical spectra. 30 It has also been predicted that the on-site Coulomb interactions can drive orbital order on the minority spin band.…”

Section: A Srruo 3 : a Ferromagnetic Metalmentioning

confidence: 99%

Magnetism and orbitally driven spin-singlet states in Ru oxides: A muon-spin rotation study

et al. 2008

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We have used zero-field muon-spin rotation to study the local magnetic properties of SrRuO 3 , Y 2 Ru 2 O 7 , and La 2 RuO 5 . While SrRuO 3 and Y 2 Ru 2 O 7 give rise to coherent precession signals, in La 2 RuO 5 we find no signature of long range magnetic order below the structural transition, but observe relaxation consistent with that expected due to a dimerization into spin-singlet states. In Y 2 Ru 2 O 7 we observe two precession signals with different temperature dependences, consistent with the nature of the noncollinear ordering being temperature dependent.

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Ru−Oorbital hybridization and orbital occupation inSrRuO3: A magnetic Compton-profile study

Cited by 15 publications

References 39 publications

Crystallographic and magnetic properties of the mixed-valence oxidesCaRu1−xMnxO3

Crystallographic and magnetic properties of the mixed-valence oxidesCaRu1−xMnxO3

The magnetic Compton scattering for the strongly correlated electron system of orthorhombic perovskite ruthenates CaRu1T O3 (T=Ti, Mn, Fe, Ni)

Magnetism and orbitally driven spin-singlet states in Ru oxides: A muon-spin rotation study

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