J. Phys. IV France 125 (2005) 173-175
About the photoacoustic signal of magnetic materialsD. 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