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Details

Autor(en) / Beteiligte
Titel
Origin of field-induced discontinuous phase transitions in Nd2Fe17
Ist Teil von
  • Physical review. B, 2018-02, Vol.97 (5)
Ort / Verlag
College Park: American Physical Society
Erscheinungsjahr
2018
Link zum Volltext
Quelle
American Physical Society
Beschreibungen/Notizen
  • 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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