TY - JOUR
T1 - Optical spectroscopic investigation on the coupling of electronic and magnetic structure in multiferroic hexagonal R MnO3 (R=Gd, Tb, Dy, and Ho) thin films
AU - Choi, Woo Seok
AU - Moon, Soon Jae
AU - Seo, Sung Seok A.
AU - Lee, Daesu
AU - Lee, Jung Hyuk
AU - Murugavel, Pattukkannu
AU - Noh, Tae Won
AU - Lee, Yun Sang
PY - 2008/8/25
Y1 - 2008/8/25
N2 - We investigated the effects of temperature and magnetic field on the electronic structure of hexagonal R MnO3 (R=Gd, Tb, Dy, and Ho) thin films using optical spectroscopy. As the magnetic ordering of the system was disturbed, a systematic change in the electronic structure was identified in this series. The optical-absorption peak near 1.7 eV showed an unexpectedly large shift of more than 150 meV from 300 to 15 K, accompanied by an anomaly of the shift at the Néel temperature. The magnetic-field dependent measurement clearly revealed a sizable shift of the corresponding peak when a high magnetic field was applied. Our findings indicated strong coupling between the magnetic ordering and the electronic structure in the multiferroic hexagonal R MnO3 compounds.
AB - We investigated the effects of temperature and magnetic field on the electronic structure of hexagonal R MnO3 (R=Gd, Tb, Dy, and Ho) thin films using optical spectroscopy. As the magnetic ordering of the system was disturbed, a systematic change in the electronic structure was identified in this series. The optical-absorption peak near 1.7 eV showed an unexpectedly large shift of more than 150 meV from 300 to 15 K, accompanied by an anomaly of the shift at the Néel temperature. The magnetic-field dependent measurement clearly revealed a sizable shift of the corresponding peak when a high magnetic field was applied. Our findings indicated strong coupling between the magnetic ordering and the electronic structure in the multiferroic hexagonal R MnO3 compounds.
UR - https://www.scopus.com/pages/publications/50449106455
UR - https://www.scopus.com/inward/citedby.url?scp=50449106455&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.78.054440
DO - 10.1103/PhysRevB.78.054440
M3 - Article
AN - SCOPUS:50449106455
SN - 1098-0121
VL - 78
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 5
M1 - 054440
ER -