Magnetic ordering above room temperature in the sigma-phase of Fe66V34

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:321

Article

Cieslak, Jakub¹  Costa, Benilde F. O.²  Dubiel, Stanislaw M.¹  Reissner, Michael³  Steiner, Walter³ 

[1] AGH Univ Sci & Technol, Fac Phys & Comp Sci, PL-30059 Krakow, Poland

[2] Univ Coimbra, CEMDRX Dept Phys, P-3000516 Coimbra, Portugal

[3] Vienna Univ Technol, Inst Solid State Phys, A-1040 Vienna, Austria

关键词: Sigma-phase;    Fe-V system;    Magnetic property;    Curie temperature;   

DOI  :  10.1016/j.jmmm.2009.01.005

来源: Elsevier

【 摘 要 】

Magnetic properties of four sigma-phase Fe100-xVx samples with 34.4 <= x <= 55.1 were investigated by Mossbauer spectroscopy and magnetic measurements in the temperature interval 4.2-300 K. Four magnetic quantities, viz. hyperfine field, Curie temperature, magnetic moment and susceptibility, were determined. The sample containing 34.4 at% V was revealed to exhibit the largest values found up to now for the sigma-phase for average hyperfine field, < B > = 12.1 T, average magnetic moment per Fe atom, = 0.89 mu(B), and Curie temperature, T-C = 315.3 K. The quantities were shown to be strongly correlated with each other. In particular, T-C is linearly correlated with with a slope of 406.5 K/mu(B), as well as < B > is so correlated with , yielding 14.3 T/mu(B) for the hyperfine coupling constant. (C) 2009 Elsevier B.V. All rights reserved.

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