Title :
Magneto-optical response of isolated and embedded Fe nanoparticles
Author :
Menéndez, J.L. ; Bescós, B. ; Armelles, G. ; Cebollada, A. ; Quintana, C. ; Navarro, E. ; Serna, R. ; Gonzalo, J. ; Alfonso, C.N. ; Doole, R. ; Petford-Long, A.K. ; Hole, D.
Author_Institution :
Inst. de Microelectron., CSIC, Madrid, Spain
fDate :
7/1/2001 12:00:00 AM
Abstract :
The magneto-optical response of nanometric Fe particles with varying size and shape has been studied, both in sputtered single layers and pulsed laser deposited nanocomposite films. The shape of Fe nanoparticles was controlled by varying growth conditions. An effective medium theory for arbitrary particle shapes has been derived and used to simulate the experimentally measured magneto-optical transverse Kerr spectra. The simulations show that the transverse Kerr magneto-optical spectra depend on the particles shape and correlate well with the experimentally determined spectra. From this result, it is deduced that Fe nanoparticles with dimensions down to 3-4 nm keep their bulk magneto-optical constants. On the other hand, large magneto-optical signals are reported in multilayered structures due to interferential effects
Keywords :
Kerr magneto-optical effect; iron; magnetic multilayers; magnetic particles; magnetic thin films; nanostructured materials; pulsed laser deposition; sputter deposition; Fe; effective medium theory; embedded iron nanoparticles; interference effects; isolated iron nanoparticles; multilayer; nanocomposite film; particle shape; particle size; pulsed laser deposition; single layer; sputter deposition; transverse Kerr magneto-optical spectra; Iron; Laser theory; Magnetooptic effects; Nanoparticles; Nanostructures; Optical pulse shaping; Optical pulses; Pulsed laser deposition; Shape control; Shape measurement;
Journal_Title :
Magnetics, IEEE Transactions on
