RECURRENT PHOTOMAGNETIC EFFECT OF Co DOPED MAGNETIC GARNET FILMS

Femtosecond photomagnetic switching of spins in ferrimagnetic garnet films.

We demonstrate that intense laser pulses can be used to directly control the spins in ferrimagnetic garnet films. Through an ultrafast and nonthermal photomagnetic effect the magnetocrystalline anisotropy is modified to create a new long-lived equilibrium orientation for the magnetization. Simultaneously, the magnetization is rotated into this new state by precession in a strong transient optic...

Magnetic Anisotropy and Phase Transitions in Co-Doped Yttrium Iron Garnet Films

YIG:Co,Ca,Ge films grown on (001) plane substrate were investigated down to liquid helium temperatures using torque anisometry technique. Successively lowering temperature spin-reorientational transitions were observed between following easy magnetization axes (EMA) orientations: (i) at room temperature four EMA inclined to the film plane from [I 111 directions; (ii) two EMA near the [I101 and ...

Excitation of magnetic precession in bismuth iron garnet via a polarization-independent impulsive photomagnetic effect

Magnetic and Optical Studies of Structure of Co-Doped Bismuth-Iron-Garnet

Using an alternating reactive ion &am sputtering technique, Co ion was doped in epitaxially growing Bi3Fe5Ol, garnet film. The intense enhancement of magnetization, coercivity, and optical absorption at 633nm was observed. The Faraday hysteresis loop for slightly Cwdoped film showed anomalous behavior. Those phenomena can be understood considering the composite film structure in which fine part...

Effect of Cobalt Concentration on Structural and Magnetic Properties of Co-Fe Thin Films

Co-Fe films were electrodeposited on Cu substrate from electrolytes with different Co concentration  levels. X-ray diffraction (XRD) was used  to  investigate  the  films  crystal  structures. The  results  indicate that  if  the  Co  concentration  is  less  that  the  Fe  concentration,  the cubic  structure  appears  in  the  films, while  the  hexagonal  structure dominates when  the C...