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

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32 Citations (Scopus)


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
Issue number10
Publication statusPublished - 2008


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