Magnetooptic Properties of Magnetite Films

Abstract

Articles you may be interested inStructural and magnetic properties of magnetite-containing epitaxial iron oxide films grown on MgO(001) substrates J. Appl. Phys. 103, 043902 (2008); 10.1063/1.2840118Microstructure and magnetic properties of magnetite thin films prepared by reactive sputteringThe Faraday and longitudinal Kerr effects, respectively, were characterized for thin chemically deposited magnetite films. The Faraday rotation was determined to be 3.9X 1()4 degjcm and the Kerr rotation 2-3 min of arc. Magnetooptical readout of digital magnetic information was achieved on a magnetitecoated disk.

Magnetic birefringence of ferrofluids. II. Pulsed field measurements

“…The values of Aj have been tabulated as functions of the axial ratio by Osborn (1945); thus if b/a=c/a= 0.90 then Aa=0.307 and Ab=0.348. If we consider the case of Fe304 particles in water, so that n=1.3 and na=nb=2*8 (Borrelli and Murphy 1971), we find that when b/a= c/a=0.90, ga-gb=0.016, a value that agrees with the observed value of the optical anisotropy reported previously (Davies and Llewellyn 1979). This calculation shows that the shape anisotropy required to explain the observed birefringence is comparatively small.…”

High magnetization and the Faraday effect for ferrimagnetic zinc ferrite thin film

“…Thus far, the Faraday effect has been examined for many ferrimagnetic ferrite compounds. For instance, the Faraday rotation angle of Fe 3 O 4 thin film was reported to be 3.9 × 10 4 deg cm −1 at 632.8 nm [11]. NiFe 2 O 4 and CoFe 2 O 4 films show Faraday rotation angles about two times smaller than that of Fe 3 O 4 [11,12].…”

“…For instance, the Faraday rotation angle of Fe 3 O 4 thin film was reported to be 3.9 × 10 4 deg cm −1 at 632.8 nm [11]. NiFe 2 O 4 and CoFe 2 O 4 films show Faraday rotation angles about two times smaller than that of Fe 3 O 4 [11,12]. For garnet-type Gd 3−x Bi x Fe 5 O 12 , the absolute value of the Faraday rotation angle at 520 nm changes from about 5 × 10 3 to 1.2 × 10 5 deg cm −1 as x varies from 0 to 1.4 [13].…”

Magneto-optic effects in ferrofluids

“…and EO= €01 -i~02. For CO the values no=2.2 and ko=4.2, corresponding to A-630 nm, were taken from the table of values given by Johnson and Christy (1974), while for Fe304 it was assumed that n0=2-8 and k0=0.3, the values given by Borrelli and Murphy (1971) for h=63208 nm. These values of no and ko give €01 = -12.8 and €02 = 18.5 for CO, and €01 = 7-75 and 602 = 1.68 for FesO4.…”