An international team has discovered a spectrum characteristic of an altermagnetic material with X-ray magnetic circular dichroism.
Magnetic materials have traditionally been classified as either ferromagnetic, like the decorative magnets on iron refrigerator doors that are seemingly always magnetic, or antiferromagnetic, like two bar magnets placed end-to-end with opposite poles facing each other, canceling each other out so that the material has no net magnetism. However, there appears to be a third class of magnetic materials exhibiting what in 2022 was dubbed altermagnetism.
An international research group led by Associate Professor Atsushi Hariki from the Graduate School of Engineering at Osaka Metropolitan University pioneered a new method to identify altermagnets, using manganese telluride as a testbed. "Our results show that XMCD is an effective method for the simple identification of altermagnetic materials," Professor Hariki said."Also, it can be expected to further accelerate the application of altermagnets in spintronics."A. Hariki, A. Dal Din, O. J. Amin, T. Yamaguchi, A. Badura, D. Kriegner, K. W. Edmonds, R. P. Campion, P. Wadley, D. Backes, L. S. I. Veiga, S. S. Dhesi, G. Springholz, L. Šmejkal, K. Výborný, T. Jungwirth, J. Kuneš.
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