Two new manifestations of the photomagnetic effect

Enz, U.; Heide, H. van der

doi:10.1016/0038-1098(68)90153-1

Cited by 83 publications

(15 citation statements)

References 2 publications

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“…5, the absorption spectrum for the Ni 0.7 Zn 0.3 Fe 1.7 Ti 0.3 O 4 film measured at 300 K is presented. 13 The calculated efficiency E for various energy regions is also presented in Fig. 12 In order to identify the optical transition responsible for the enhancement of PIM in the Ni 0.7 Zn 0.3 Fe 1.7 Ti 0.3 O 4 film, the excitation energy dependence was measured by filtering the broadband light of a Xe lamp using the optical bandpass filters.…”

Section: Resultsmentioning

confidence: 99%

“…12 In order to identify the optical transition responsible for the enhancement of PIM in the Ni 0.7 Zn 0.3 Fe 1.7 Ti 0.3 O 4 film, the excitation energy dependence was measured by filtering the broadband light of a Xe lamp using the optical bandpass filters. 3,[13][14][15][16] For example, in bulk CoFe 2 O 4 , it was reported that the coercive force decreased due to the charge transfer between Co 2+ and Fe 3+ ions. 13 The calculated efficiency E for various energy regions is also presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The change in magnetic properties due to a photoinduced charge transfer has been reported for several kinds of materials. 13,15,16 In Si 4+ -doped YIG, the rearrangement of Fe 2+ ions via the IVCT causes the appearance of a uniaxial magnetic anisotropy in the sample, which is called a photomagnetic effect. 14 As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

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High-temperature cluster glass state and photomagnetism in Zn- and Ti-substituted NiFe2O4 films

Seki

Hossain

Kawai

et al. 2005

Journal of Applied Physics

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We report on the cluster glass nature and photoinduced magnetization ͑PIM͒ of ͑Ni, Zn, Fe, Ti͒ 3 O 4 thin films prepared using a pulsed-laser deposition ͑PLD͒ technique. The films exhibit cluster glass behaviors with a spin-freezing temperature T f of approximately 230 K. It was found that the magnetization increases following light irradiation below T f . The experimental results suggest that the electronic transitions induced by photons are intrinsic to the observed PIM rather than the thermal heating effects resulting from light irradiation. The change in the magnetization from the original dark value at 10 K was approximately 40% for the Ni 0.7 Zn 0.3 Fe 1.7 Ti 0.3 O 4 film, and it was approximately 5% for the Ni 0.4 Zn 0.6 Fe 2 O 4 film when the excitation intensity is 1.48 mW/ mm 2 . The analysis of the excitation energy dependence of PIM suggests that an intervalence charge transfer Ti 4+ +Fe 2+ → Ti 3+ +Fe 3+ contributes to the observed enhancement in the PIM of the Ti-substituted films.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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High-temperature cluster glass state and photomagnetism in Zn- and Ti-substituted NiFe2O4 films

Seki

Hossain

Kawai

et al. 2005

Journal of Applied Physics

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“…The first observations of the effect of electromagnetic radiation on susceptibility were made by Enz and co-workers, who found that infrared illumination of Si-doped Y3Fe5012 (YIG) (Enz and van der Heide 1968) and Ga-doped CdCrzSee (Lems et a1 1968) at low temperatures caused the susceptibility to decrease. They explained their results in terms of a two-centre model, a less stable type I1 centre being formed from a more stable type I centre by photo-induced electron transfer.…”

Section: Introductionmentioning

confidence: 99%

Endomorphisms of Abelian Varieties Over Fields of Finite Characteristic

Zarhin¹

1975

Math. USSR Izv.

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The effects of illumination on the susceptibility of ferric borate are described, and the domain structures that occur in ferric borate are discussed. It is shown that the photo-induced changes agree with a simple domain wall model, the walls probably being of the Nee1 type. The time and temperature dependence of the photo-induced increases are consistent with a localized centre model in which the centres can exist in two energy states, each with a different anisotropy. The energy reqiiired to excite the centres is received indirectly from the photons, via Fe3+ ions.

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“…,10 Since then various types of optomagnetic phenomena have been observed in materials such as ErCrO 3 , 11 Cd 0.91 Mn 0.09 Te;In, 12 magnetization. In the present communication, we will show the photoinduced Faraday effect of this film in the visible region.…”

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confidence: 99%