THE PHOTON PRESSURE EFFECT AND CHANGE OF MAGNETIC-OPTIC CHARACTERISTICS OF MULTILAYERED NANOFILMS

Mykola M. Krupa ,  Yurii B. Skyrta 

Institute of Magnetism NASU (IMag), Vernadsky 36-b, Kyiv 03142, Ukraine

Abstract

The results of the research of dependence of magnetic-optic characteristics multilayered nanofilms Bi-SiC-TbFe-SiC, Ti-SiC-TbFe-SiC, SiC-TbFe-SiC and Tb-Au-Fe on the power and direction of fall of the nanosecond pulses of laser radiation on film structure are presented. It is revealed that the value of Kerr and Faraday angle in films Bi-SiC-TbFe-SiC, Ti-SiC-TbFe-Si and Tb-Au-Fe changes differently. Character and value of these changes depend not only on the intensity and duration of laser pulses, but also on the structure of a film as well as on the direction photon flux fall on the film structure and the direction of an external magnetic field.
The analysis of the results allows show that the obtained changes of the magnetic-optic characteristics are connected with the contribution of nonequilibrium electrons with a high spin polarization. Under the action of pulses of the laser these electrons, due to photon pressure, go from a magnetic layer into a nonmagnetic layer of the film structure and magnetize them locally, which causes an additional turn of the plane of polarization of the light and change its magnetic-optic characteristics.
Experimental dependencies on the intensity and duration of pulses, on the direction of fall of the nanosecond pulses of laser radiation on the film structure and the direction of an external magnetic field will be well coordinated with the described physical model, which stresses the necessity of taking into account the effect of photon pressure of light while investigating the interaction of laser radiation with multilayered nanofilms structures.

 

Related papers
  1. MAGNETORESISTANCE OF Ni-Mn-Ga THIN FILMS IN THE VICINITY OF MAGNETOSTRUCTURAL TRANSFORMATION
  2. The broadband magneto-electric energy conversion by the NiMnGa single crystal/piezoceramic system
  3. PROPERTIES OF SPUTTER-DEPOSITED Ni-Mn-Ga THIN FILMS
  4. DEPENDENCE OF THE MAGNETIC ANISOTROPY ON THE THICKNESS AND ANNEALING OF SPUTTER-DEPOSITED Ni-Mn-Ga THIN FILMS

Presentation: poster at E-MRS Fall Meeting 2005, Symposium F, by Mykola M. Krupa
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-05-27 08:45
Revised:   2009-06-07 00:44