Structural and magnetic properties of LaFe_13-xSi_x nitrides

Authors

Z.X. Tang, Department of Physics & Astronomy, University of Delaware, Newark, DE
X.H. Deng, Department of Physics & Astronomy, University of Delaware, Newark, DE
George C. Hadjipanayis, University of DelawareFollow
V. Papaefthymiou, Department of Physics, University of Ioannina, Ioannina, Greece
David J. Sellmyer, University of Nebraska-LincolnFollow

Date of this Version

11-1-1993

Comments

Published by IEEE; IEEE Trans. Magn. 29, 2839 (1993). ©1993 IEEE. Permission to use. http://ieeexplore.ieee.org/

Abstract

LaFe_13-xSi_x compounds were found to have two types of crystal structure; the face-centered cubic Na_13--type (x ≤2.4) and the body-centered tetragonal Ce₂Ni₁₇Si₉-type (3.5≤x≤5.0). Nitrogenation has a strong effect on the cubic phase, including a large lattice expansion (6.2 to 10.8 %), an increase of Curie temperature (52 to 80 K) and spontaneous magnetization ( ~10 %). The tetragonal phase, however, was not significantly affected by the nitrogenation.