상세 보기
- Kang, T. D.;
- Standard, E. C.;
- Rogers, P. D.;
- Ahn, K. H.;
- Sirenko, A. A.;
- ... Park, S.;
- 외 4명
WEB OF SCIENCE
20SCOPUS
20초록
Far-infrared spectra of ferrimagnetic Dy3Fe5O12 single crystals have been studied in the spectral range between 12 and 700 cm(-1) and in a wide temperature range between 5 K and 300 K using transmission spectroscopy and rotating analyzer ellipsometry. In the temperature range below T-C = 16 K for the magnetic ordering of Dy3+ spins, a number of ligand field and Kaplan-Kittel (KK) exchange resonance modes have been found. Temperature dependencies of their frequencies allowed us to estimate the ratio between the Fe-Dy and Dy-Dy exchange constants. We found that variation of the oscillator strength of the KK modes correlates with the magnetic-field-induced changes of magnetic permeability. The low-temperature peak in the static value of the dielectric function at T-C = 16 K may be related to the observed temperature-induced variation of the oscillator strength of the optical phonons.
키워드
- 제목
- Far-infrared spectra of the magnetic exchange resonances and optical phonons and their connection to magnetic and dielectric properties of Dy3Fe5O12 garnet
- 저자
- Kang, T. D.; Standard, E. C.; Rogers, P. D.; Ahn, K. H.; Sirenko, A. A.; Dubroka, A.; Bernhard, C.; Park, S.; Choi, Y. J.; Cheong, S. -W.
- 발행일
- 2012-10
- 유형
- Article
- 권
- 86
- 호
- 14