High-field magnetisation of SmCo5-xCux (x~2.5) determined in pulse fields up to 48 T

• Published in: Journal of magnetism and magnetic materials Vol. 290-291; pp. 420 - 423
• Main Authors: Kerschl, P, Handstein, A, Khlopkov, K, Gutfleisch, O, Eckert, D, Nenkov, K, Tellez-Blanco, J-C, Grossinger, R, Miiller, K-H, Schultz, L
• Format: Journal Article
• Language: English
• Published: 01.04.2005
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2004.11.489

The strong influence of Cu substitution on the magnetic properties of SmCo5, especially on the coercive field, is well known. Induction-melted samples (x = 2, 2.5, 3) show a phase separation within the 1:5 structure. An unusual jump from a low to a high magnetisation state in an increasing external field is observed. Using pulse field, high coercive forces up to about mu0 jHc ~30 T and a high critical field poHu for the unusual jump reaching 45 T at 4.2 K for x = 3 are observed for the first time. Hc and Hu increase with decreasing temperature. An influence of the field changing rate on the measured Hu is found.