Investigation of Co$_2$FeSi: The Heusler compound with Highest Curie Temperature and Magnetic Moment
Sabine Wurmehl, Gerhard H. Fecher, Hem Chandra Kandpal, Vadim, Ksenofontov, Claudia Felser, and Hong-Ji Lin
TL;DR
This paper investigates Co$_2$FeSi, a Heusler compound with the highest known Curie temperature and magnetic moment, through structural and magnetic analyses, establishing its exceptional magnetic properties among similar materials.
Contribution
It provides detailed structural and magnetic characterization of Co$_2$FeSi$, demonstrating its record-high Curie temperature and magnetic moment among Heusler compounds.
Findings
Co$_2$FeSi$ has a Curie temperature of 1100K.
It exhibits a magnetic moment of 6 μ_B.
The compound has an ordered $L2_1$ structure.
Abstract
This work reports on structural and magnetic investigations of the Heusler compound CoFeSi. X-Ray diffraction and M\"o\ss bauer spectrometry indicate an ordered structure. Magnetic measurements by means of X-ray magnetic circular dichroism and magnetometry revealed that this compound is, currently, the material with the highest magnetic moment () and Curie-temperature (1100K) in the classes of Heusler compounds as well as half-metallic ferromagnets.
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