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ChemInform Abstract: Effect of Interstitial Hydrogen and Nitrogen on the Magnetocrystalline Anisotropy of Ln2Fe17 (Ln: Tb, Dy, Ho, Er).

✍ Scribed by S. A. NIKITIN; E. A. OVTCHENKOV; A. A. SALAMOVA; A. YU. SOKOLOV; V. N. VERBETSKY

Publisher: John Wiley and Sons
Year: 2010
Weight: 35 KB
Volume: 29
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199803013

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✦ Synopsis

Effect of Interstitial Hydrogen and Nitrogen on the Magnetocrystalline Anisotropy of Ln 2 Fe 17 (Ln: Tb, Dy, Ho, Er).

-The title studies are performed by analyzing the hard and easy magnetization curves of magnetically aligned Ln 2 Fe 17 and Ln 2 Fe 17 (H,N)x (Ln: Tb, Dy, Ho, Er) samples in the temp. range 80-300 K. Hydrogen and nitrogen atoms have opposite effects on the magnetocrystalline anisotropy.

Contrary to nitrogenation, hydrogenation leads to an easy axis type Ln sublattice anisotropy for Ln ions with negative Stevens factor α 2 (Tb, Dy, Ho). Easy-plane to easy-cone spin reorientation transitions are found at 250 and 200 K for Dy 2 Fe 17 Hx (x = 3 and 5), respectively. Tb 2 Fe 17 Hx (x = 3 and 5) probably exhibit an easy-cone type structure at room temperature. -(NIKITIN, S. A.; OVTCHENKOV,

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