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Title: Observation of Electronic Ferroelectric Polarization in Multiferroic YMn(2)O(5)

Abstract

We report the observation of a magnetic polarization of the O 2p states in YMn{sub 2}O{sub 5} through the use of soft x-ray resonant scattering at the oxygen K edge. Remarkably, we find that the temperature dependence of the integrated intensity of this signal closely follows the macroscopic electric polarization, and hence is proportional to the ferroelectric order parameter. This is in contrast with the temperature dependence observed at the Mn L{sub 3} edge, which reflects the Mn magnetic order parameter. First-principles calculations provide a microscopic understanding of these results and show that a spin-dependent hybridization of O 2p and Mn 3d states results in a purely electronic contribution to the ferroelectric polarization, which can exist in the absence of lattice distortions.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
BROOKHAVEN NATIONAL LABORATORY (BNL)
Sponsoring Org.:
DOE - OFFICE OF SCIENCE
OSTI Identifier:
1033209
Report Number(s):
BNL-95265-2011-JA
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: PO-011; KC0202010; TRN: US1200307
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 107; Journal Issue: 5; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; HYBRIDIZATION; ORDER PARAMETERS; OXYGEN; POLARIZATION; SCATTERING; TEMPERATURE DEPENDENCE; electronic ferroelectric polarization; transition metal oxides; temperature dependence

Citation Formats

Hill, J.P., Partzsch, S., Wilkins, S.B., Schierle, E., Weschke E., Souptel, D., Buchner, B., and Geck, J. Observation of Electronic Ferroelectric Polarization in Multiferroic YMn(2)O(5). United States: N. p., 2011. Web.
Hill, J.P., Partzsch, S., Wilkins, S.B., Schierle, E., Weschke E., Souptel, D., Buchner, B., & Geck, J. Observation of Electronic Ferroelectric Polarization in Multiferroic YMn(2)O(5). United States.
Hill, J.P., Partzsch, S., Wilkins, S.B., Schierle, E., Weschke E., Souptel, D., Buchner, B., and Geck, J. Mon . "Observation of Electronic Ferroelectric Polarization in Multiferroic YMn(2)O(5)". United States.
@article{osti_1033209,
title = {Observation of Electronic Ferroelectric Polarization in Multiferroic YMn(2)O(5)},
author = {Hill, J.P. and Partzsch, S. and Wilkins, S.B. and Schierle, E. and Weschke E. and Souptel, D. and Buchner, B. and Geck, J.},
abstractNote = {We report the observation of a magnetic polarization of the O 2p states in YMn{sub 2}O{sub 5} through the use of soft x-ray resonant scattering at the oxygen K edge. Remarkably, we find that the temperature dependence of the integrated intensity of this signal closely follows the macroscopic electric polarization, and hence is proportional to the ferroelectric order parameter. This is in contrast with the temperature dependence observed at the Mn L{sub 3} edge, which reflects the Mn magnetic order parameter. First-principles calculations provide a microscopic understanding of these results and show that a spin-dependent hybridization of O 2p and Mn 3d states results in a purely electronic contribution to the ferroelectric polarization, which can exist in the absence of lattice distortions.},
doi = {},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 5,
volume = 107,
place = {United States},
year = {2011},
month = {7}
}