Faraday Rotation and Hysteresis Properties of Ferrite Thin Films

Francombe, M. H.; Rudisill, J. Earl; Coren, R. L.

doi:10.1063/1.1729441

Cited by 12 publications

(4 citation statements)

References 7 publications

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“…The specific Faraday rotation for Pt600 and Pt1100 samples are 5.3 × 10 3 and 2.2 × 10 3 degree cm −1 , respectively. Similar specific Faraday rotation is reported for ferromagnetic samples such as ZnFe 2 O 4 [27], NiFe 2 O 4 [47], Gd 3−x Bi x Fe 5 O 12 [48], are of the order of 10 3 -10 5 deg cm −1 at visible wavelength. For TI-600 and TI-1100 samples the Faraday rotation is larger than Pt600 samples as shown in figure 5(b).…”

Section: Resultssupporting

confidence: 82%

Enhanced ultrafast optomagnetic effects in room-temperature ferromagnetic Pt nanoclusters embedded in silica by ion implantation

et al. 2020

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Ferromagnetic-like behavior at room temperature (300 K) was observed in Pt particles embedded in ion-implanted silica matrices. Results in samples integrated by ultra-small photoluminescent Pt clusters (<2 nm) were compared with samples containing exclusively larger plasmonic Pt nanoparticles (>3 nm). The ferromagnetic behavior coexists simultaneously with a diamagnetic response. Enhanced diamagnetic response of one order of magnitude was observed compared to typical diamagnetism in pure silica, and it is increased with the mean diameter of the Pt particles. Besides, a larger sensitivity to an external field was observed in the ferromagnetic response of the nanostructures with a characteristic saturation at 20 kOe. This ferromagnetic behavior was only observed in the samples with nucleated Pt particles. The magnitude of the saturation magnetization shows up to a fivefold increase in the samples with smaller particle size and larger particle density. Saturation magnetization was observed between 3–15 × 10−4 emu g−1, with remanent magnetization of 0.2–0.6 × 10−4emu g−1, measured at 300 K. Coercitive fields also decrease in samples with smaller size and particles density, with values of 114 and 300 Oe. At lower temperatures (5 K) the saturation magnetization increases, as it would be expected from a ferromagnetic state. Optomagnetic response was studied by inverse Faraday effects and induced photomagnetization with circular polarized picosecond pulsed light at 1064 nm wavelength. Results showed that samples with a stronger ferromagnetic response exhibit larger Faraday rotation up to 5.3 × 103deg cm−1 by light excitations with irradiances between 50 and 180 GW cm−2. These findings have immediate applications in multifunctional solid-state magneto-optical devices such as optical isolators, high-data storage devices and ultrafast all-optical switching of magnetization.

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Section: Resultssupporting

confidence: 82%

Enhanced ultrafast optomagnetic effects in room-temperature ferromagnetic Pt nanoclusters embedded in silica by ion implantation

et al. 2020

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“…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].…”

Section: Resultsmentioning

confidence: 99%

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

Tanaka

Nakashima

Fujita

et al. 2003

J. Phys.: Condens. Matter

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The magnetization and Faraday effect in the wavelength range of 350–850 nm have been measured for zinc ferrite thin film prepared by the sputtering method. X-ray diffraction analysis indicates that the thin film is single-phase ZnFe2O4, whose crystallite size evaluated from Scherrer’s equation is 10 nm or so. The thin film is extremely transparent for wavelengths longer than about 600 nm, and exhibits high magnetization, i.e., 32 emu g−1, at 1 T even at room temperature. The absolute value of the Faraday rotation angle is 1.0 × 104 deg cm−1 at a wavelength of 470 nm when an external magnetic field of 5 kOe is applied.

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“…The value of VMs is thus 3.9X10 4 deg/cm for magnetite films. The average saturation magnetization of the above films was 380 G, so that V = 100 deg/cm G. Francombe et al 6 reported the Faraday rotation for NiFe204 and CoFe 2 04 films as 3X loa and 6 X loa deg/ em, respectively. However, these numbers appear to include the tancf>R term as well as the lpp/l'8 term.…”

Section: /J= Xijei(w) Ei(w) +Tjijkei(w )Mi(o)ek(w)mentioning

confidence: 92%

“…The expression for the effect 4 is given by the expression for sand p polarized light, respectively, (6) where "v, "8, , Vp are defined in Table I.…”

Section: /J= Xijei(w) Ei(w) +Tjijkei(w )Mi(o)ek(w)mentioning

confidence: 99%

Magnetooptic Properties of Magnetite Films

Borrelli¹,

Murphy²

1971

Journal of Applied Physics

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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.

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Faraday Rotation and Hysteresis Properties of Ferrite Thin Films

Cited by 12 publications

References 7 publications

Enhanced ultrafast optomagnetic effects in room-temperature ferromagnetic Pt nanoclusters embedded in silica by ion implantation

Enhanced ultrafast optomagnetic effects in room-temperature ferromagnetic Pt nanoclusters embedded in silica by ion implantation

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

Magnetooptic Properties of Magnetite Films

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