Volume dependence of the magnetic coupling in la Fe13-x Six based compounds

L. Jia, J. R. Sun, F. W. Wang, T. Y. Zhao, H. W. Zhang, B. G. Shen, D. X. Li, S. Nimori, Y. Ren, Q. S. Zeng

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

The effects of pressure and hydrogenation, the former causes a lattice contraction while the latter causes an expansion of the sample, have been systematically studied for La Fe13-x Six (x=1.3-2.1). It is found that the typical change of the Curie temperature is ∼150 K when ∼1.6 Hf.u. is absorbed and ∼-106 K as the pressure sweeps from 0 to 1 GPa. One of the most remarkable results of the present work is the presence of a universal relation between Curie temperature and phase volume. The former linearly grows with the increase of lattice constant (∼1510 KÅ), irrespective of how the phase volume is modified. This result implies the exclusive dependence of the magnetic coupling in La Fe13-x Six on the Fe-Fe distances and the interstitial hydrogen does not affect the electronic structure of the compounds.

Original languageEnglish
Article number101904
JournalApplied Physics Letters
Volume92
Issue number10
DOIs
Publication statusPublished - 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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