Magnetic and thermal scans: A new Mössbauer effect approach

G.A.PASQUEVICH; P.MENDOZA ZÉLIS; F.H.SÁNCHEZ; M.B.FERNÁNDEZ VAN RAAP; A.VEIGA; N.MARTÍNEZ

HYPERFINE INTERACTIONS

Año: 2006 vol. 167 p. 839 - 844

0304-3843

Mössbauer transmission recorded at fixed photon energies as a function of a given physical parameter such as temperature, external field, etc. (Mössbauer scan), is being developed as a useful quantitative tool, complementary of Mössbauer spectroscopy. Scans are performed at selected energies, suitable for the observation of a given physical property or process. It is shown that one of main advantages of this approach is the higher speed at which the external physical parameter can be swept, which allows the recording of quasi-continuous experimental response functions as well as the study of processes which occur too fast to be followed by Mössbauer spectroscopy. The applications presented here are the determination of the temperature dependence of the 57Fe hyperfine field in FeSn2, the thermal evolution and nanocrystallization kinetics of amorphous Fe73.5Si13.5Cu1Nb3B9 and the measurement of the dynamic response of Fe magnetic moments in nanocrystalline Fe90Zr7B3 to an external ac field.