Abstract
The paramagnetic Curie temperature is a concept that describes the magnetic ordering temperature in the well-established Curie-Weiss law. Despite the successful explanations of the magnetic behavior, the anisotropy is not usually considered. Although anisotropic has been reported for several layered antiferromagnetic or ferrimagnetic materials owing to the orientation-dependent exchange, in ferromagnetic systems, was thought to be almost isotropic for decades, and the occasionally reported small difference has remained unexplained. In this paper, we experimentally report the anisotropic magnetization, critical temperature, and paramagnetic Curie temperature in highly anisotropic magnetic caused by a large magnetocrystalline anisotropy. The saturation magnetization along the axis is 25% larger than that along the axis. The critical temperature and paramagnetic Curie temperature along the axis are 6 and 15 K higher than those along the axis, respectively, as deduced from the Arrott plots and inverse susceptibility. A simple modification of the Curie-Weiss law was made to calculate the anisotropic , which well explains not only , but also many other previously reported ferromagnetic materials.
- Received 6 April 2021
- Revised 18 May 2021
- Accepted 4 June 2021
DOI:https://doi.org/10.1103/PhysRevB.103.214436
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by the Max Planck Society.
Published by the American Physical Society