Temperature and Exchange Field Dependences of the Magnetic and Magnetooptical Properties of under Low and Intense Magnetic Field
- Conference date: 15–18 June 1976
- Location: Pittsburgh, Pennsylvania (USA)
Faraday rotation (φF) measurement are reported in YIG at 1.15 and 0.6328 microns wavelengths under low and very intense magnetic fields (up to 4 megaOersteds). These results are discussed from the applied field and temperature dependences of the magnetooptical (M.O.) coefficients induced by the light beam in both the octahedral (a) and tetrahedral (d) sites. It is shown that under very intense magnetic field and in the visible range the M.O. coefficients Am and Dm induced by the magnetic dipole transitions are independent on the applied field and φm follows the usual evolution of the magnetic structure which shows a first‐order transition (ferri ⇒ non colinear structure) near . On the other hand in the near infrared Am and Dm have a strong magnetic field dependence in the mega‐Oersteds range with increasing the. d.c. field. It is shown that the magnetic and electric parts of φF are increasing and decreasing respectively when increasing the d.c. field and the experimental data are in agreement with a molecular field model where the magnetic intra‐sublattices interactions Jaa and Jdd are vanishing.
- Magnetic fields
- Magnetic field measurements
- Faraday effect
- Magnetooptical effects
- Rotation measurement
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