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Title: Electronic transition above room temperature in CaMn7O12 films

Abstract

Here, we report on the electronic phase transition in CaMn7O12 quadruple perovskite films synthesized by oxide molecular beam epitaxy on SrLaAlO4 and La0.3Sr0.7Al0.65Ta0.35O3 substrates. We use x-ray diffraction and transmission electron microscopy to confirm that the CaMn7O12 phase has been realized. Temperature dependent resistivity measurements reveal a signature of a charge ordering phase transition at ≈425 K, consistent with bulk CaMn7O12. The transition temperature is found to be relatively invariant to changes in the cation stoichiometry. Density functional theory calculations reveal the changes in atomic and electronic structure induced by the charge ordering transition.

Authors:
 [1];  [1];  [2];  [2];  [1];  [2];  [1];  [1]
  1. Drexel Univ., Philadelphia, PA (United States)
  2. Univ. of Pennsylvania, Philadelphia, PA (United States)
Publication Date:
Research Org.:
Univ. of Pennsylvania, Philadelphia, PA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1469380
Alternate Identifier(s):
OSTI ID: 1222850
Grant/Contract Number:  
FG02-07ER46431
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 107; Journal Issue: 14; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Huon, A., Lang, A. C., Saldana-Greco, D., Lim, J. S., Moon, E. J., Rappe, A. M., Taheri, M. L., and May, S. J. Electronic transition above room temperature in CaMn7O12 films. United States: N. p., 2015. Web. doi:10.1063/1.4932132.
Huon, A., Lang, A. C., Saldana-Greco, D., Lim, J. S., Moon, E. J., Rappe, A. M., Taheri, M. L., & May, S. J. Electronic transition above room temperature in CaMn7O12 films. United States. https://doi.org/10.1063/1.4932132
Huon, A., Lang, A. C., Saldana-Greco, D., Lim, J. S., Moon, E. J., Rappe, A. M., Taheri, M. L., and May, S. J. 2015. "Electronic transition above room temperature in CaMn7O12 films". United States. https://doi.org/10.1063/1.4932132. https://www.osti.gov/servlets/purl/1469380.
@article{osti_1469380,
title = {Electronic transition above room temperature in CaMn7O12 films},
author = {Huon, A. and Lang, A. C. and Saldana-Greco, D. and Lim, J. S. and Moon, E. J. and Rappe, A. M. and Taheri, M. L. and May, S. J.},
abstractNote = {Here, we report on the electronic phase transition in CaMn7O12 quadruple perovskite films synthesized by oxide molecular beam epitaxy on SrLaAlO4 and La0.3Sr0.7Al0.65Ta0.35O3 substrates. We use x-ray diffraction and transmission electron microscopy to confirm that the CaMn7O12 phase has been realized. Temperature dependent resistivity measurements reveal a signature of a charge ordering phase transition at ≈425 K, consistent with bulk CaMn7O12. The transition temperature is found to be relatively invariant to changes in the cation stoichiometry. Density functional theory calculations reveal the changes in atomic and electronic structure induced by the charge ordering transition.},
doi = {10.1063/1.4932132},
url = {https://www.osti.gov/biblio/1469380}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 14,
volume = 107,
place = {United States},
year = {Mon Oct 05 00:00:00 EDT 2015},
month = {Mon Oct 05 00:00:00 EDT 2015}
}

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Cited by: 8 works
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Works referencing / citing this record:

Preparation of epitaxial CaMn7O12 film via sol-gel method and its ferromagnetic properties
journal, November 2018