Title :
Mossbauer and magnetization studies of amorphous NdFeB compositionally modulated thin films
Author :
Martinez, B. ; Moreu, M.A. ; Ruiz, A. ; Labarta, A. ; Obradors, X. ; Briones, F. ; Tejada, J.
Author_Institution :
ICMAB, CSIC, Barcelona, Spain
fDate :
3/1/1988 12:00:00 AM
Abstract :
Several NdFeB compositionally modulated thin films are studied by using both conversion electron Mossbauer spectra and SQUID (superconducting quantum-interference-device) magnetometry. Both the hyperfine fields and the easy magnetization magnitude are not correlated with the modulation characteristic length ( lambda ) while the magnetization perpendicular to the thin-film plane decreases as lambda increases. The spectra were recorded at room temperature being the gamma rays perpendicular to the substrate plane. The magnetization measurements were recorded by using a SHE SQUID magnetometer in applied magnetic fields up to 5.5 T and in the temperature range between 1.8 and 30 K.
Keywords :
Mossbauer effect; boron alloys; hyperfine field interactions (condensed matter); iron alloys; magnetic properties of amorphous substances; magnetic thin films; magnetisation; neodymium alloys; 1.8 to 300 K; amorphous NdFeB; compositionally modulated thin films; conversion electron Mossbauer spectra; easy magnetization magnitude; hyperfine fields; magnetization; modulation characteristic length; room temperature; Amorphous magnetic materials; Amorphous materials; Electrons; Magnetic field measurement; Magnetic modulators; Magnetization; Perpendicular magnetic recording; SQUIDs; Superconducting thin films; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
