Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session K19: Optical, Thermal and Mechanical Coupling to Spin Currents
8:00 AM–11:00 AM,
Wednesday, March 7, 2018
LACC
Room: 308A
Sponsoring
Units:
GMAG DMP FIAP
Chair: Chunhui Du, Harvard Univ
Abstract ID: BAPS.2018.MAR.K19.3
Abstract: K19.00003 : Temperature dependent Mueller matrix of magnetized Ni near the Curie temperature
8:24 AM–8:36 AM
Presenter:
Farzin Abadizaman
(Physics, New Mexico State Univ)
Authors:
Farzin Abadizaman
(Physics, New Mexico State Univ)
Pablo Paradis
(Physics, New Mexico State University)
Stefan Zollner
(Physics, New Mexico State University)
Collaboration:
farzin Abadizaman
Assuming that magnetized Ni is not depolarizing, the MM is derived up to the first order of Voigt parameter from the Jones matrix. Using spectroscopic ellipsometry at an incident angle of 70° and a UHV cryostat we took three dynamic measurements in a temperature range between 400 and 770 K. The experimental MM describes significant changes in the on-diagonal and negligible ones in off-diagonal blocks about Tc. The authors believe that the changes in off-diagonal elements are due to the magneto-optical Kerr effect.
However, the considerable changes of the on-diagonal blocks of the MM indicate that the variations in optical constants about Tc come from the diagonal elements of the dielectric tensor, which is described by Drude response. This means that either the scattering rate or the carrier density changes under magnetization. Furthermore, inverting the direction of the magnetization shows that all elements of the MM depend only on the magnitude of the magnetization, not the direction. This is in contrast to the theoretical MM.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.K19.3
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