Temperature evolution of itinerant ferromagnetism in SrRuO3 probed by optical spectroscopy

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Title
Temperature evolution of itinerant ferromagnetism in SrRuO3 probed by optical spectroscopy
Author(s)
Da Woon Jeong; Hong Chul Choi; Choong H. Kim; Seo Hyoung Chang; Chang Hee Sohn; Hyun Ju Park; Tae Dong Kang; Deok-Yong Cho; Baek S.H.; Eom C.B.; Shim J.H.; Yu J.; Kim K.W.; Moon S.J.; Taewon Noh
Publication Date
2013-06
Journal
PHYSICAL REVIEW LETTERS, v.110, no.24, pp.247202-1 - 247202-5
Publisher
AMER PHYSICAL SOC
Abstract
The temperature (T) dependence of the optical conductivity spectra σ(ω) of a single crystal SrRuO3 thin film is studied over a T range from 5 to 450 K. We observed significant T dependence of the spectral weights of the charge transfer and interband d-d transitions across the ferromagnetic Curie temperature (Tc∼150 K). Such T dependence was attributed to the increase in the Ru spin moment, which is consistent with the results of density functional theory calculations. T scans of σ(Ω,T) at fixed frequencies Ω reveal a clear T2 dependence below Tc, demonstrating that the Stoner mechanism is involved in the evolution of the electronic structure. In addition, σ(Ω,T) continues to evolve at temperatures above Tc, indicating that the local spin moment persists in the paramagnetic state. This suggests that SrRuO3 is an intriguing oxide system with itinerant ferromagnetism. © 2013 American Physical Society.
URI
https://pr.ibs.re.kr/handle/8788114/1313
ISSN
0031-9007
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Files in This Item:
2013-06-11-Physical Review Letters-Temperature evolution.pdfDownload

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