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Title: Optical and Magneto-Optical Properties of AuMnSn

Abstract

No abstract prepared.

Authors:
; ; ;
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA
Sponsoring Org.:
USDOE Office of Science and Technology (OST) - (EM-50)
OSTI Identifier:
891189
Report Number(s):
IS-J 7091
Journal ID: ISSN 0003-6951; APPLAB; TRN: US200621%%654
DOE Contract Number:
W-7405-Eng-82
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 88; Journal Issue: 12
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; PHYSICS; MATERIALS; MAGNETO-OPTICAL EFFECTS; OPTICAL PROPERTIES

Citation Formats

S.J. Lee, Y. Janssen, J.M. Park, and B.K. Cho. Optical and Magneto-Optical Properties of AuMnSn. United States: N. p., 2006. Web.
S.J. Lee, Y. Janssen, J.M. Park, & B.K. Cho. Optical and Magneto-Optical Properties of AuMnSn. United States.
S.J. Lee, Y. Janssen, J.M. Park, and B.K. Cho. Thu . "Optical and Magneto-Optical Properties of AuMnSn". United States. doi:.
@article{osti_891189,
title = {Optical and Magneto-Optical Properties of AuMnSn},
author = {S.J. Lee and Y. Janssen and J.M. Park and B.K. Cho},
abstractNote = {No abstract prepared.},
doi = {},
journal = {Applied Physics Letters},
number = 12,
volume = 88,
place = {United States},
year = {Thu Feb 02 00:00:00 EST 2006},
month = {Thu Feb 02 00:00:00 EST 2006}
}
  • The magneto-optic (MO) Kerr and Faraday spectra for manganese pnictides are calculated using the all electron, relativistic, full-potential linear muffin-tin orbital method. The amplitude of our calculated spectra are found to be in good agreement with corresponding experimental spectra. Although the MO property is a rather complicated function of the diagonal and off-diagonal elements of the optical conductivity tensor, present theory nevertheless provides very practical insight about its origin in these compounds. The largest Kerr effect observed in MnBi can be understood as a combined effect of maximal exchange splitting of Mn 3d states and the nearly maximal spin-orbit (s-o)more » coupling of Bi. The frequency-dependent optical properties, namely reflectivity, absorption coefficient, electron-energy-loss spectra, refractive index, extinction coefficient are given. From our calculations (including spin-orbit coupling and orbital polarization) the site-projected spin and orbital moments are also obtained and compared to the available experimental values and a good agreement is found. The magnetic anisotropy energy is calculated with a minimal number of approximations for the three systems. A disagreement between theory and experiment is found. Using the generalized gradient corrected full-potential linear augmented plane-wave method we have calculated the unscreened plasma frequencies and the hyperfine parameters such as electric-field gradient as well as the hyperfine field. {copyright} {ital 1999} {ital The American Physical Society}« less
  • No abstract prepared.
  • No abstract prepared.
  • No abstract prepared.
  • Wide-band optical isolators are indispensable for wavelength multiplexing optical fiber communication systems to eliminate noise induced by the reflected light from optical devices. To realize the wide-band optical isolator for wavelength of 1.5 {mu}m, we have found a new composition of Bi-substituted terbium iron garnet (Tb{sub 3{minus}{ital x}}Bi{sub {ital x}}Fe{sub 5}O{sub 12}) and developed a crystal growth method of the garnet.{sup 1} The composition of the crystals was determined by SEM and by x-ray fluorescence. Wavelength dependence of the Faraday rotation (FR) of Tb{sub 3{minus}{ital x}}Bi{sub {ital x}}Fe{sub 5}O{sub 12} single crystals was measured with a rotation-analyzer polarimeter and amore » spectrometer at room temperature. The wavelength coefficient of the FR of Tb{sub 3{minus}{ital x}}Bi{sub {ital x}}Fe{sub 5{minus}{ital y}}Ga{sub {ital y}}O{sub 12} ({ital x}=0.25, {ital y}{lt}0.3) is as small as 0.1%/0.2 {mu}m at a wavelength of 1.5 {mu}m. This is less than 1/10 of that (3%/0.2 {mu}m) obtained for Gd{sub 2}Bi{sub 1}Fe{sub 5}O{sub 12}. The value of the FR for the crystal with {ital x}=0.25 was about {minus}205{degree}/cm at {lambda}=1.5 {mu}m. We have also found empirically that between FR coefficient {theta}{sub {ital F}}({ital x}) and Bi-concentration {ital x}, there is a simple relationship given by {theta}{sub {ital F}}({ital x})={minus}1540{ital x}+180{degree}/cm. By using these crystals as a Faraday rotator, we have developed wide band optical isolators for wavelength of 1.5 {mu}m. Forward loss of 0.5 dB and backward loss of 33 dB were obtained at the wavelength region from 1.5 to 1.7 {mu}m. The size of the isolator is 6 mm diam{times}6 mm long and its weight is 0.4 g. Through an optical fiber transmission system with the isolator, we could transmit a stable and clear picture for the lights of 1.5--1.7 {mu}m wavelength.« less