Temperature dependent magnetic properties and application potential of intermetallic Fe11-xCox TiCe

The novel quaternary compound Fe11–xCox TiCe (x = 0 to 3.25) of Mn12Th 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 K1 and saturation polarization Js are observed for a Co content of 15 at% (x = 1.95) with K1 and Js of 2.15 MJ/m3 (1.22 MJ/m3) 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/m3, µ0Hc = 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/m3 of the costs of Dy‐free Fe–Nd–B. (© 2014 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim) To understand the influence of Co content in novel quaternary intermetallic compound Fe11–xCoxTiCe of Mn12Th structure the temperature dependence of intrinsic magnetic properties is measured. This new aspect of the material especially at elevated temperatures is crucial for its application potential which is evaluated in this work.