On the ferromagnetism of AlFe2B2

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:323

Article

ElMassalami, M.¹  Oliveira, D. da S.¹  Takeya, H.² 

[1] Univ Fed Rio de Janeiro, Inst Fis, BR-21945970 Rio De Janeiro, Brazil

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

关键词: AlFe2B2;    Ternary compounds;    Ferromagnet;    Mossbauer effect spectroscopy;    Magnetic properties of intermetallic;   

DOI  :  10.1016/j.jmmm.2011.03.008

来源: Elsevier

【 摘 要 】

Based on extensive Mossbauer effect (ME) and magnetization measurements, the orthorhombic AlFe2B2 was characterized as a ferromagnet (FM) because this character is evident as an onset of a FM transition at T-c=320 K and characteristic magnetizations isotherms below T-c. At liquid helium temperatures, the magnetization saturates to mu(sat) approximate to 1 mu(B) per Fe atom; a value which is half the one reported for the iron metal indicating a relatively more filled 3d band. The ME analysis revealed a hyperfine field H(0) of 88(2) kOe, an isomer shift (relative to Fe) of 0.50(2) mm/s, and a quadrupole parameter of 0.02 mm/s: all parameters extrapolated to zero Kelvin. The itinerant character of the magnetic moment will be discussed. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

Free