Eur. Phys. J. B 34, 467-471 (2003)
https://doi.org/10.1140/epjb/e2003-00245-9

Magnetic and exchange studies in amorphous Co_80-xHo_xB₂₀ alloys

¹ Laboratoire de Physique Théorique et Appliquée (LPTA), Faculté des Sciences Dhar Mahraz, BP 1796, Fès Atlas, Morocco
² Laboratoire de Physique de la Matière Condensée et de l'Environnement (LPMCE), E.N.S. Fès-Bensouda, Morocco
³ Laboratoire de Physique des Matériaux et de Microélectronique, Université Hassan II, Faculté des Sciences, BP 5366, Aïn Chock, Route d'El Jadida, km-8, Casablanca, Morocco

Corresponding authors: ^a sayouri1@caramail.com ssayouri@yahoo.com

Received: 25 October 2002
Revised: 7 June 2003
Published online: 9 September 2003

Abstract

Amorphous Co_80-xHo_xB₂₀ alloys were prepared by melt spinning technique and their magnetic properties have been studied. The magnetic compensation occurs at about x=8. Antiferromagnetic coupling between Co and Ho prevails and breaks at relatively high-fields. The mean field theory has been used to explain the temperature dependence of the magnetization. The exchange interactions between Co-Co and Co-Ho atom pairs have been evaluated.