Tailoring the ferrimagnetic-to-ferromagnetic transition field by interstitial and substitutional atoms in the R–Fe compounds. (September 2019)

• Record Type: Journal Article
• Authors: Tereshina, I.S.; Ivanov, L.A.; Tereshina-Chitrova, E.A.; Gorbunov, D.I.; Paukov, M.A.; Havela, L.; Drulis, H.; Granovsky, S.A.; Doerr, M.; Gaviko, V.S.; Andreev, A.V.
• Is Part Of: Intermetallics. Volume 112(2019:Sep.)
• Publication Date: 2019-09
• Subjects: Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2019.106546
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: Fundamental characteristics of rare-earth ( R ) – iron intermetallics R2 Fe14 B are highly sensitive to the atomic substitutions and interstitial absorption of light elements. We studied a combined influence of the substitutions in the rare-earth sublattice and hydrogen absorption on the magnetization behavior in magnetic fields up to 60 T Er2 Fe14 B and Tm2 Fe14 B ferrimagnets chosen for the study showed that the substitution of Nd for Er or Tm increases the saturation magnetization as a result of ferromagnetic ordering of Nd and Fe moments. Under sufficiently high magnetic fields the magnetic moments rotate and the field-induced ferromagnetic state may be observed. The field at which a transition occurs is related to the strength of the inter-sublattice exchange interaction. The role of hydrogen is primarily to weaken the inter-sublattice ferrimagnetic coupling so that the reorientation becomes achievable at the available magnetic field strength (in hydrides Tm2 Fe14 BH5.5 and (Tm0.5 Nd0.5 )2 Fe14 BH5.5 ). We analyze the volume dependence of the R–Fe magnetic interaction in R 2 Fe14 B and compare it with other R –Fe compounds. Highlights: Characteristics of rare-earth–iron alloys are sensitive to both substitutions and interstitial absorption of light elements. We studied a combined influence of the substitutions and hydrogen absorption on the magnetization behavior of R2 Fe14 B alloys. We analyzed the volume dependence of magnetic interaction in R2 Fe14 B and compare it with other R–Fe compounds.