Nonsymmorphic Antiferromagnet LaMnSi: Single-Crystal Studies

The magnetic properties of LaMnSi with a nonsymmorphic tetragonal structure were investigated using single crystals for the first time. LaMnSi exhibits an antiferromagnetic (AFM) ordering of Mn-3d electrons at TN = 293 K. Since the magnetization along the [001] direction decreases steeply on cooling...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2022-01, Vol.91 (1), p.1
Main Authors: Tanida, Hiroshi, Matsuoka, Hiroto, Mitsumoto, Keisuke, Muro, Yuji, Fukuhara, Tadashi, Harima, Hisatomo
Format: Article
Language:English
Subjects:
Antiferromagnetism
Crystal structure
Crystals
Energy gap
Magnetic properties
Single crystals
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Summary:The magnetic properties of LaMnSi with a nonsymmorphic tetragonal structure were investigated using single crystals for the first time. LaMnSi exhibits an antiferromagnetic (AFM) ordering of Mn-3d electrons at TN = 293 K. Since the magnetization along the [001] direction decreases steeply on cooling below TN, an AFM ordered moment is parallel to the [001] direction. We also found that the electrical resistivity shows a small upturn at TN, indicating that an energy gap is partially opened. The mechanism of the gap formation is not ascribed to a superzone gap, as is often observed in metallic antiferromagnets, but to a unique one in nonsymmorphic antiferromagnets with a propagation vector q = 0.
ISSN:0031-9015
1347-4073
DOI:10.7566/JPSJ.91.013704