J. Phys. IV France
Volume 125, June 2005
Page(s) 173 - 175

J. Phys. IV France 125 (2005) 173-175

DOI: 10.1051/jp4:2005125040

About the photoacoustic signal of magnetic materials

D. Acosta-Avalos1, P.R. Barja1 and M.D. Silva2

1  Instituto de Pesquisa e Desenvolvimento (IP&D), Universidade do Vale do Paraiba, Av. Shishima Hifumi 2911, CEP 12244-000, São José dos Campos, SP, Brasil
2  Instituto de Pesquisas Espaciais (INPE), Av. dos Astronautas, São José dos Campos, SP, Brasil

The photoacoustic signal of magnets was measured in the presence of external magnetic fields, through the presence of intense magnets. It was observed that the intense magnetic field at the surface of a rare earth magnet can change the photoacoustic signal of a weak ferrite magnet. A possible explanation for the PA signal change is discussed.

© EDP Sciences 2005