Abstract
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 Tc=320K and characteristic magnetizations isotherms below Tc. At liquid helium temperatures, the magnetization saturates to μsat≈1μB 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 0.02mm/s: all parameters extrapolated to zero Kelvin. The itinerant character of the magnetic moment will be discussed.
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