Determination of the iron atomic magnetic moments dynamics in the nanocrystalline ribbons Fe90Zr7B3 by Mo¨ ssbauer magnetic scans

G.A. PASQUEVICHA, P. MENDOZA ZE LIS, F.H. SANCHEZ, M.B. FERNANDEZ VAN RAAP, A.L. VEIGA, N. MARTINEZ

PHYSICA B - CONDENSED MATTER

Elsevier

Año: 2006 vol. 384 p. 348 - 350

0921-4526

We have applied the transmission Mo¨ ssbauer effect at a constant Doppler velocity technique, under 75 Oe external oscillating magnetic field in the frequency range 0?200 Hz, to determine the dynamics of the iron magnetic moments in nanocrystalline ribbons Fe90Zr7B3. The experiment was performed at a fixed Doppler velocity coincident with an absorption line of the absorbent. Since the dependence of the absorption on the angle between the gamma ray directions and the magnetic field at the nuclear probe is known, the change in the orientation of the iron atomic magnetic moments with the external field can be inferred. Due to the fact that in this case the absorption lines from the nanocrystalline phase are resolved from the amorphous one, performing the experiment at distinct absorption lines, we were able to determine the dynamics of the atomic moments of each phase independently. These results are complemented with Mossbauer Spectroscopy.