Hole concentration dependence of Mn eg orbital state in bilayer manganites studied by magnetic Compton profile measurement

Koizumi, Akira; Nagao, T.; Kakutani, Yukinobu; Hiraoka, Nozomu; Sakai, Nobuhiko; Arima, T.; Hirota, K.; Murakami, Youichi

doi:10.1016/j.jpcs.2005.09.013

Cited by 4 publications

(5 citation statements)

References 35 publications

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“…The single layered analogs, however, do not exhibit the metallic or ferromagnetic phases characteristic of the CMR compounds, suggesting that c-axis coupling between the MnO 2 planes, within the bilayer, is relevant to CMR physics. This may be supported by the observations of doping dependent decreases of the Jahn-Teller distortions, 2,3 c-axis directed orbital occupancies, 4,5 and the inter-plane exchange coupling within the bilayer. 6,7 Because bulk c-axis transport is dominated by the weak coupling between bilayers, it is blind to the interlayer coupling within the bilayers.…”

Section: Introductionmentioning

confidence: 62%

“…If correlations preclude coherent hopping between these planes, BLS will be absent. 23 Possible explanations for the disappearence of BLS at higher doping include the decrease of the out-of-plane orbital occupancy 4,5 which is likely related to the decrease of the Jahn-Teller distortions. 2,3,24 These trends may be the source of the differences in electronic structure presented here, as well as the root of the differences previously reported for these two dopings.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Bilayer splitting and c-axis coupling in bilayer manganites showing colossal magnetoresistance

Jozwiak,

Graf,

Zhou

et al. 2008

Preprint

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By performing angle-resolved photoemission spectroscopy of the bilayer colossal magnetoresistive (CMR) manganite, La2−2xSr1+2xMn2O7, we provide the complete mapping of the Fermi level spectral weight topology. Clear and unambiguous bilayer splitting of the in-plane 3d x 2 −y 2 band, mapped throughout the Brillouin zone, and the full mapping of the 3d 3z 2 −r 2 band are reported. Peculiar doping and temperature dependencies of these bands imply that as transition from the ferromagnetic metallic phase approaches, either as a function of doping or temperature, coherence along the c-axis between planes within the bilayer is lost, resulting in reduced interplane coupling. These results suggest that interplane coupling plays a large role in the CMR transition.

show abstract

Section: Introductionmentioning

confidence: 62%

Section: Resultsmentioning

confidence: 99%

Bilayer splitting and c-axis coupling in bilayer manganites showing colossal magnetoresistance

Jozwiak,

Graf,

Zhou

et al. 2008

Preprint

View full text Add to dashboard Cite

show abstract

“…The single layered analogs, however, do not exhibit the metallic or ferromagnetic phases characteristic of the CMR compounds, suggesting that c-axis coupling between the MnO 2 planes, within the bilayer, is relevant to CMR physics. This may be supported by the observations of doping dependent decreases of the JahnTeller distortions, 2,3 c-axis directed orbital occupancies, 4,5 and the interplane exchange coupling within the bilayer. 6,7 Because bulk c-axis transport is dominated by the weak coupling between bilayers, it is blind to the interlayer coupling within the bilayers.…”

Section: Introductionmentioning

confidence: 62%

Bilayer splitting andc-axis coupling in bilayer manganites showing colossal magnetoresistance

et al. 2009

View full text Add to dashboard Cite

By performing angle-resolved photoemission spectroscopy of the bilayer colossal magnetoresistive ͑CMR͒ manganite, La 2−2x Sr 1+2x Mn 2 O 7 , we provide the complete mapping of the Fermi-level spectral weight topology. Clear and unambiguous bilayer splitting of the in-plane 3d x 2 −y 2 band, mapped throughout the Brillouin zone, and the full mapping of the 3d 3z 2 −r 2 band are reported. Peculiar doping and temperature dependencies of these bands imply that as transition from the ferromagnetic metallic phase approaches, either as a function of doping or temperature, coherence along the c-axis between planes within the bilayer is lost, resulting in reduced interplane coupling. These results suggest that interplane coupling plays a large role in the CMR transition.

show abstract

“…As shown in Ref. [6], the MCP depends on the angle between the incident beam direction and the quantization axis in sample. In addition, as Eq.…”

Section: Resultsmentioning

confidence: 83%

“…This means that the quadrupolar degrees of freedom, almost synonymous with the orbital degrees of freedom, are crucial to elucidate the magnetic properties in Np-115 compounds. Since the magnetic Compton profile (MCP) is a useful tool to investigate the orbital degrees of freedom [6], we apply the magnetic Compton scattering (MCS) to Np-115 compounds in the present work.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Compton scattering study of NpNiGa5

Tsutsui

Sakurai

Itou

et al. 2007

Journal of Physics and Chemistry of Solids

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Hole concentration dependence of Mn eg orbital state in bilayer manganites studied by magnetic Compton profile measurement

Cited by 4 publications

References 35 publications

Bilayer splitting and c-axis coupling in bilayer manganites showing colossal magnetoresistance

Bilayer splitting and c-axis coupling in bilayer manganites showing colossal magnetoresistance

Bilayer splitting andc-axis coupling in bilayer manganites showing colossal magnetoresistance

Magnetic Compton scattering study of NpNiGa5

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