Temperature dependent magnetic properties and application potential of intermetallic Fe 11– x Co x TiCe

The novel quaternary compound Fe 11– x Co x TiCe ( x = 0 to 3.25) of Mn 12 Th structure has been fabricated by arc melting. The analysis is focused on temperature dependent determination of intrinsic properties from 4 K to 750 K using domain pattern analysis and magnetometry. Above room temperature RT maximum values of anisotropy constant K 1 and saturation polarization J s are observed for a Co content of 15 at% ( x = 1.95) with K 1 and J s of 2.15 MJ/m 3 (1.22 MJ/m 3 ) and 1.27 T (1.05 T) at RT (200 °C). At operating temperatures of 100 °C for this material magnetic properties ( BH ) max = 282 kJ/m 3 , µ 0 H c = 0.94 T are expected. If a suitable microstructure could be processed, based on intrinsic properties of the phases the costs would be 35% per J/m 3 of the costs of Dy‐free Fe–Nd–B. (© 2014 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)