skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Temperature dependent evolution of the electronic and local atomic structure in the cubic colossal magnetoresistive manganite La1-xSrxMnO3

Abstract

We have studied the temperature-dependent evolution of the electronic and local atomic structure in the cubic colossal magnetoresistive manganite La{sub 1-x}Sr{sub x}MnO{sub 3} (x= 0.3-0.4) with core and valence level photoemission (PE), x-ray absorption spectroscopy (XAS), x-ray emission spectroscopy (XES), resonant inelastic x-ray scattering (RIXS), extended x-ray absorption fine structure (EXAFS) spectroscopy and magnetometry. As the temperature is varied across the Curie temperature T{sub c}, our PE experiments reveal a dramatic change of the electronic structure involving an increase in the Mn spin moment from {approx} 3 {micro}B to {approx} 4 {micro}B, and a modification of the local chemical environment of the other constituent atoms indicative of electron localization on the Mn atom. These effects are reversible and exhibit a slow-timescale {approx}200 K-wide hysteresis centered at T{sub c}. Based upon the probing depths accessed in our PE measurements, these effects seem to survive for at least 35-50 {angstrom} inward from the surface, while other consistent signatures for this modification of the electronic structure are revealed by more bulk sensitive spectroscopies like XAS and XES/RIXS. We interpret these effects as spectroscopic fingerprints for polaron formation, consistent with the presence of local Jahn-Teller distortions of the MnO{sub 6} octahedra around the Mnmore » atom, as revealed by the EXAFS data. Magnetic susceptibility measurements in addition show typical signatures of ferro-magnetic clusters formation well above the Curie temperature.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Advanced Light Source Division; Materials Sciences Division
OSTI Identifier:
928306
Report Number(s):
LBNL-239E
TRN: US0804324
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 77; Related Information: Journal Publication Date: 2008
Country of Publication:
United States
Language:
English
Subject:
75; ABSORPTION; ABSORPTION SPECTROSCOPY; ATOMS; CURIE POINT; ELECTRONIC STRUCTURE; ELECTRONS; EMISSION SPECTROSCOPY; FINE STRUCTURE; HYSTERESIS; MAGNETIC SUSCEPTIBILITY; MODIFICATIONS; PHOTOEMISSION; POLARONS; SCATTERING; SPECTROSCOPY; SPIN; VALENCE; XAS RIXS EXAFS LSMO CMR GMR PM FM PE

Citation Formats

Arenholz, Elke, Mannella, N., Booth, C.H., Rosenhahn, A., Sell, B.C., Nambu, A., Marchesini, S., Mun, B. S., Yang, S.-H., Watanabe, M., Ibrahim, K., Arenholz, E., Young, A., Guo, J., Tomioka, Y., and Fadley, C.S. Temperature dependent evolution of the electronic and local atomic structure in the cubic colossal magnetoresistive manganite La1-xSrxMnO3. United States: N. p., 2007. Web.
Arenholz, Elke, Mannella, N., Booth, C.H., Rosenhahn, A., Sell, B.C., Nambu, A., Marchesini, S., Mun, B. S., Yang, S.-H., Watanabe, M., Ibrahim, K., Arenholz, E., Young, A., Guo, J., Tomioka, Y., & Fadley, C.S. Temperature dependent evolution of the electronic and local atomic structure in the cubic colossal magnetoresistive manganite La1-xSrxMnO3. United States.
Arenholz, Elke, Mannella, N., Booth, C.H., Rosenhahn, A., Sell, B.C., Nambu, A., Marchesini, S., Mun, B. S., Yang, S.-H., Watanabe, M., Ibrahim, K., Arenholz, E., Young, A., Guo, J., Tomioka, Y., and Fadley, C.S. Thu . "Temperature dependent evolution of the electronic and local atomic structure in the cubic colossal magnetoresistive manganite La1-xSrxMnO3". United States. https://www.osti.gov/servlets/purl/928306.
@article{osti_928306,
title = {Temperature dependent evolution of the electronic and local atomic structure in the cubic colossal magnetoresistive manganite La1-xSrxMnO3},
author = {Arenholz, Elke and Mannella, N. and Booth, C.H. and Rosenhahn, A. and Sell, B.C. and Nambu, A. and Marchesini, S. and Mun, B. S. and Yang, S.-H. and Watanabe, M. and Ibrahim, K. and Arenholz, E. and Young, A. and Guo, J. and Tomioka, Y. and Fadley, C.S.},
abstractNote = {We have studied the temperature-dependent evolution of the electronic and local atomic structure in the cubic colossal magnetoresistive manganite La{sub 1-x}Sr{sub x}MnO{sub 3} (x= 0.3-0.4) with core and valence level photoemission (PE), x-ray absorption spectroscopy (XAS), x-ray emission spectroscopy (XES), resonant inelastic x-ray scattering (RIXS), extended x-ray absorption fine structure (EXAFS) spectroscopy and magnetometry. As the temperature is varied across the Curie temperature T{sub c}, our PE experiments reveal a dramatic change of the electronic structure involving an increase in the Mn spin moment from {approx} 3 {micro}B to {approx} 4 {micro}B, and a modification of the local chemical environment of the other constituent atoms indicative of electron localization on the Mn atom. These effects are reversible and exhibit a slow-timescale {approx}200 K-wide hysteresis centered at T{sub c}. Based upon the probing depths accessed in our PE measurements, these effects seem to survive for at least 35-50 {angstrom} inward from the surface, while other consistent signatures for this modification of the electronic structure are revealed by more bulk sensitive spectroscopies like XAS and XES/RIXS. We interpret these effects as spectroscopic fingerprints for polaron formation, consistent with the presence of local Jahn-Teller distortions of the MnO{sub 6} octahedra around the Mn atom, as revealed by the EXAFS data. Magnetic susceptibility measurements in addition show typical signatures of ferro-magnetic clusters formation well above the Curie temperature.},
doi = {},
journal = {Physical Review B},
number = ,
volume = 77,
place = {United States},
year = {2007},
month = {12}
}