STUDY OF EQUIPMENT AND METHODS FOR MEASURING OPTICAL-MAGNETIC AND MAGNETO-OPTICAL PROPERTIES OF RARE EARTH IONS. American Journal of Research in Humanities and Social Sciences, [S. l.], v. 37, p. 48–50, 2025. Disponível em: https://americanjournal.org/index.php/ajrhss/article/view/3012. Acesso em: 12 oct. 2025.