Origin of field-induced discontinuous phase transitions in Nd2Fe17

Magnetic properties of a trigonal ferromagnet Nd2Fe17 have been studied on single crystals in steady (14 T) and pulsed (32 T) magnetic fields. The easy-magnetization direction lies close to the [120] axis, deviating from the basal plane by 2.9∘ (at T=5K). Of particular interest is the low-temperatur...

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Published in:Physical review. B 2018-02, Vol.97 (5)
Main Authors: Diop, L V B, Kuz'min, M D, Skokov, K P, Skourski, Y, Gutfleisch, O
Format: Article
Language:English
Subjects:
Anisotropy
Basal plane
Ferromagnetism
Magnetic fields
Magnetic properties
Magnetism
Magnetization
Phase transitions
Single crystals
Symmetry
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Kuz'min, M D
Skokov, K P
Skourski, Y
Gutfleisch, O
description Magnetic properties of a trigonal ferromagnet Nd2Fe17 have been studied on single crystals in steady (14 T) and pulsed (32 T) magnetic fields. The easy-magnetization direction lies close to the [120] axis, deviating from the basal plane by 2.9∘ (at T=5K). Of particular interest is the low-temperature magnetization process along the high-symmetry axis [001], which is the hard direction. This process is discontinuous and involves two first-order phase transitions (FOMPs). One of them (at 20 T) is a symmetry FOMP similar to that observed in Sm2Fe17. The second transition (at 10.4 T) is unusual: as the magnetization turns abruptly toward the applied field, it also changes its azimuthal orientation (the angle φ) by 60∘. Both transitions can be reasonably accounted for by the presence of a significant sixth-order trigonal anisotropy term.
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subjects Anisotropy
Basal plane
Ferromagnetism
Magnetic fields
Magnetic properties
Magnetism
Magnetization
Phase transitions
Single crystals
Symmetry
title Origin of field-induced discontinuous phase transitions in Nd2Fe17
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