Orbital correlations and dimensional crossover in epitaxial Pr 0.5Ca0.5MnO3/La0.5Sr 0.5MnO3 superlattices

H. Wadati, J. Okamoto, M. Garganourakis, V. Scagnoli, U. Staub, E. Sakai, H. Kumigashira, T. Sugiyama, E. Ikenaga, M. Nakamura, M. Kawasaki, Y. Tokura

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We studied the charge-orbital ordering in the superlattice of charge-ordered insulating Pr0.5Ca0.5MnO3 and ferromagnetic metallic La0.5Sr0.5MnO3 by resonant soft x-ray diffraction (RSXD) and hard x-ray photoemission spectroscopy (HXPES). A temperature-dependent incommensurability is found in the orbital ordering by RSXD. In addition, a large hysteresis is observed that is caused by phase competition between the insulating charge ordered and metallic ferromagnetic states. No magnetic phase transitions are observed in contrast to pure Pr0.5Ca0.5MnO3 thin films, confirming the unique character of the superlattice. Mn HXPES spectra revealed a hysteresis in the metalicity, supporting the picture of phase competition. The deviation from the commensurate orbital order can be directly related to the decrease of ordered-layer thickness that leads to dimensional crossover from three-dimensional to two-dimensional orbital ordering.

Original languageEnglish
Article number073044
JournalNew Journal of Physics
Volume16
DOIs
Publication statusPublished - Jul 2014

Fingerprint

superlattices
crossovers
orbitals
x ray diffraction
photoelectric emission
hysteresis
spectroscopy
x rays
deviation
thin films
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Wadati, H., Okamoto, J., Garganourakis, M., Scagnoli, V., Staub, U., Sakai, E., ... Tokura, Y. (2014). Orbital correlations and dimensional crossover in epitaxial Pr 0.5Ca0.5MnO3/La0.5Sr 0.5MnO3 superlattices. New Journal of Physics, 16, [073044]. https://doi.org/10.1088/1367-2630/16/7/073044

Orbital correlations and dimensional crossover in epitaxial Pr 0.5Ca0.5MnO3/La0.5Sr 0.5MnO3 superlattices. / Wadati, H.; Okamoto, J.; Garganourakis, M.; Scagnoli, V.; Staub, U.; Sakai, E.; Kumigashira, H.; Sugiyama, T.; Ikenaga, E.; Nakamura, M.; Kawasaki, M.; Tokura, Y.

In: New Journal of Physics, Vol. 16, 073044, 07.2014.

Research output: Contribution to journalArticle

Wadati, H, Okamoto, J, Garganourakis, M, Scagnoli, V, Staub, U, Sakai, E, Kumigashira, H, Sugiyama, T, Ikenaga, E, Nakamura, M, Kawasaki, M & Tokura, Y 2014, 'Orbital correlations and dimensional crossover in epitaxial Pr 0.5Ca0.5MnO3/La0.5Sr 0.5MnO3 superlattices', New Journal of Physics, vol. 16, 073044. https://doi.org/10.1088/1367-2630/16/7/073044
Wadati, H. ; Okamoto, J. ; Garganourakis, M. ; Scagnoli, V. ; Staub, U. ; Sakai, E. ; Kumigashira, H. ; Sugiyama, T. ; Ikenaga, E. ; Nakamura, M. ; Kawasaki, M. ; Tokura, Y. / Orbital correlations and dimensional crossover in epitaxial Pr 0.5Ca0.5MnO3/La0.5Sr 0.5MnO3 superlattices. In: New Journal of Physics. 2014 ; Vol. 16.
@article{8da0cfe5508e40b0b03020f0552f1244,
title = "Orbital correlations and dimensional crossover in epitaxial Pr 0.5Ca0.5MnO3/La0.5Sr 0.5MnO3 superlattices",
abstract = "We studied the charge-orbital ordering in the superlattice of charge-ordered insulating Pr0.5Ca0.5MnO3 and ferromagnetic metallic La0.5Sr0.5MnO3 by resonant soft x-ray diffraction (RSXD) and hard x-ray photoemission spectroscopy (HXPES). A temperature-dependent incommensurability is found in the orbital ordering by RSXD. In addition, a large hysteresis is observed that is caused by phase competition between the insulating charge ordered and metallic ferromagnetic states. No magnetic phase transitions are observed in contrast to pure Pr0.5Ca0.5MnO3 thin films, confirming the unique character of the superlattice. Mn HXPES spectra revealed a hysteresis in the metalicity, supporting the picture of phase competition. The deviation from the commensurate orbital order can be directly related to the decrease of ordered-layer thickness that leads to dimensional crossover from three-dimensional to two-dimensional orbital ordering.",
author = "H. Wadati and J. Okamoto and M. Garganourakis and V. Scagnoli and U. Staub and E. Sakai and H. Kumigashira and T. Sugiyama and E. Ikenaga and M. Nakamura and M. Kawasaki and Y. Tokura",
year = "2014",
month = "7",
doi = "10.1088/1367-2630/16/7/073044",
language = "English",
volume = "16",
journal = "New Journal of Physics",
issn = "1367-2630",
publisher = "IOP Publishing Ltd.",

}

TY - JOUR

T1 - Orbital correlations and dimensional crossover in epitaxial Pr 0.5Ca0.5MnO3/La0.5Sr 0.5MnO3 superlattices

AU - Wadati, H.

AU - Okamoto, J.

AU - Garganourakis, M.

AU - Scagnoli, V.

AU - Staub, U.

AU - Sakai, E.

AU - Kumigashira, H.

AU - Sugiyama, T.

AU - Ikenaga, E.

AU - Nakamura, M.

AU - Kawasaki, M.

AU - Tokura, Y.

PY - 2014/7

Y1 - 2014/7

N2 - We studied the charge-orbital ordering in the superlattice of charge-ordered insulating Pr0.5Ca0.5MnO3 and ferromagnetic metallic La0.5Sr0.5MnO3 by resonant soft x-ray diffraction (RSXD) and hard x-ray photoemission spectroscopy (HXPES). A temperature-dependent incommensurability is found in the orbital ordering by RSXD. In addition, a large hysteresis is observed that is caused by phase competition between the insulating charge ordered and metallic ferromagnetic states. No magnetic phase transitions are observed in contrast to pure Pr0.5Ca0.5MnO3 thin films, confirming the unique character of the superlattice. Mn HXPES spectra revealed a hysteresis in the metalicity, supporting the picture of phase competition. The deviation from the commensurate orbital order can be directly related to the decrease of ordered-layer thickness that leads to dimensional crossover from three-dimensional to two-dimensional orbital ordering.

AB - We studied the charge-orbital ordering in the superlattice of charge-ordered insulating Pr0.5Ca0.5MnO3 and ferromagnetic metallic La0.5Sr0.5MnO3 by resonant soft x-ray diffraction (RSXD) and hard x-ray photoemission spectroscopy (HXPES). A temperature-dependent incommensurability is found in the orbital ordering by RSXD. In addition, a large hysteresis is observed that is caused by phase competition between the insulating charge ordered and metallic ferromagnetic states. No magnetic phase transitions are observed in contrast to pure Pr0.5Ca0.5MnO3 thin films, confirming the unique character of the superlattice. Mn HXPES spectra revealed a hysteresis in the metalicity, supporting the picture of phase competition. The deviation from the commensurate orbital order can be directly related to the decrease of ordered-layer thickness that leads to dimensional crossover from three-dimensional to two-dimensional orbital ordering.

UR - http://www.scopus.com/inward/record.url?scp=84905168413&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84905168413&partnerID=8YFLogxK

U2 - 10.1088/1367-2630/16/7/073044

DO - 10.1088/1367-2630/16/7/073044

M3 - Article

AN - SCOPUS:84905168413

VL - 16

JO - New Journal of Physics

JF - New Journal of Physics

SN - 1367-2630

M1 - 073044

ER -