THEORETICAL STUDY OF PHASE FORMING, MAGNETIZATION AND LATTICE VIBRATIONS OF Fe23-xTxB6(T = Cr, Mn, Ni, C), Fe23 C6, Fe23B6 AND Fe23CB6

Author:

WANG XIAO-XU1,QIAN PING1,AN ZHI-WEI1,LI YA-PING1,ZHANG ZHEN-FENG1,LI JIN-CHUN1,CHEN NAN-XIAN12

Affiliation:

1. Institute of Applied Physics, Beijing University of Science and Technology, Beijing 100083, China

2. Department of Physics, Tsinghua University, Beijing 100084, China

Abstract

We present a theoretical investigation on the phase stability, site preference and lattice constants of Fe 23-x T x B 6( T = Cr , Mn , Ni , C ), Fe 23 C 6 and Fe 23 CB 6. The calculated results show that in Fe 23-x T x B 6 the Cr , Mn or Ni atoms prefer 4a sites. Fe 23 CB 6 may form with Cr 23 C 6 prototype structure, and the carbon atoms are positioned at 4a sites. The calculated lattice constants are found to agree with report in literatures. We have calculated the magnetic moments of Fe 23 C 6, Fe 23 B 6 and Fe 23 CB 6 compounds. Furthermore, the total and partial phonon densities of states are evaluated first for these compounds. The analysis of the inverted potentials explains qualitatively the contributions of different atoms to the vibrational modes.

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,Statistical and Nonlinear Physics

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