Photoproduction and relaxation of long-lived active charges in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ca</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Mn</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ge</mml:mi></mml:mrow><mml:mrow>

Eremenko, V. V.; Gnatchenko, S. L.; Kachur, I. S.; Piryatinskaya, V. G.; Ratner, A. M.; Shapiro, V. V.

doi:10.1103/physrevb.61.10670

Cited by 17 publications

(19 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further effects of magnetic field influence on the currents at this temperature are not revealed. Investigations of inner photoeffect in PC with NP Fe 2 O 3 resulting in electronic recharge of magnetic ions and changes of their magnetic and spin states are of interest for the development of new photomagnetic mediums [11,12]. …”

Section: Resultsmentioning

confidence: 99%

Polymeric compositions with hematite nanoparticles and organic compounds with charge transfer

Давиденко

2004

phys. stat. sol. (c)

View full text Add to dashboard Cite

The magnetoresistance, electric and photoconductivity of polymeric films based on polyvinylbutyral doped with compounds with intramolecular charge transfer (CICT) and containing nanoparticles Fe 2 O 3 have been investigated. The photoconductivity of such polymeric compositions is governed by photogeneration of non-equilibrium charge carriers from excited with light CICT molecules and by their transport inside and between the particles. Revealing of inner photoeffect in investigated nanocomposite are of interest for development of new mediums with photomagnetic properties.Introduction Films of polymeric compositions (PC) with inorganic nanoparticles (NP) are of interest due to their possible using in molecular electronics (see, e.g. [1]). As such their electric and photoconducting properties are of great importance. These properties are determined by the concentration and dimensions of the NP and are quite different, compared to the same bulk materials. A decrease of the NP dimensions is accompanied by a hypsochromic shift of the edge of optical absorption band. Therefore, in such PC, photoeffects within visible and near IR parts of spectrum are small [2]. Sensitization of PC by dyes or related compounds [3, 4] is one possibility aimed at extending the spectral range of their photosensitivity. However, the efficiency of the inner photoeffect attributed to light absorption by sensitizer and photogeneration of charge carriers, depends on possibilities of electronic transitions between the sensitizer molecules and the NP. The present paper is aimed at investigation the electric and photoconductivity properties of PC films based on polyvinylbutyral (PVB) doped with organic compounds with intramolecular charge transfer (CICT) [5] and containing NP Fe 2 O 3 . PVB possesses good film-forming features. The films without special doping appear among dielectrics and are transparent for visible light. CICT are quite well dissoluble in PC, have wide and intensive bands of electronic absorption in visible and near IR ranges of light spectrum and are used as sensitizers of photoconductivity in recording mediums based on organic photosemiconductors [6]. That is why, one can suppose that CICT can serve as centers of charge photogeneration in PC with NP as well.

show abstract

Section: Resultsmentioning

confidence: 99%

Polymeric compositions with hematite nanoparticles and organic compounds with charge transfer

Давиденко

2004

phys. stat. sol. (c)

View full text Add to dashboard Cite

show abstract

“…PMEs are investigated in a wide class of materials, such as garnets of different compositions [1][2][3], spin glasses, ferrites, metals, organic materials, etc. Actually, all known PMEs could be divided into two classes: independent of light polarization and polarization-sensitive [1].…”

Section: Introductionmentioning

confidence: 99%

Photoinduced magnetization reversal in yttrium–iron garnets doped with silicon and cobalt

Давиденко

2004

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…The pump-induced change in transmissivity is also believed to be related to the photoexcitation of impurities. 99 Finally, we would like to note that an ultrafast effect of light on magnetic anisotropy has been also observed in the antiferromagnetic dielectric NiO. 100…”

Section: Microscopic Justificationmentioning

confidence: 99%

Ultrafast all-optical control of the magnetization in magnetic dielectrics

Kirilyuk

Kimel

Hansteen

et al. 2006

Low Temperature Physics

View full text Add to dashboard Cite

The purpose of this review is to summarize the recent progress on laser-induced magnetization dynamics in magnetic dielectrics. Due to the slow phonon-magnon interaction in these materials, direct thermal effects of the laser excitation can only be seen on the time scale of almost a nanosecond and thus are clearly distinguished from the ultrafast nonthermal effects. However, laser pulses are shown to indirectly modify the magnetic anisotropy in rare-earth orthoferrites via the crystal field, and to bring about spin reorientation within a few picoseconds. More interesting, however, are the direct nonthermal effects of light on spin systems. We demonstrate coherent optical control of the magnetization in ferrimagnetic garnet films on a femtosecond time scale through a combination of two different ultrafast and nonthermal photomagnetic effects and by employing multiple pump pulses. Linearly polarized laser pulses are shown to create a long-lived modification of the magnetocrystalline anisotropy via optically induced electron transfer between nonequivalent ion sites. In addition, circularly polarized pulses are shown to act as strong transient magnetic field pulses originating from the nonabsorptive inverse Faraday effect. An alloptical scheme of excitation and detection of different antiferromagnetic resonance modes with frequencies of up to 500 GHz will be discussed as well. The reported effects open new and exciting possibilities for ultrafast manipulation of spins by light and provide new insight into the physics of magnetism on ultrafast time scales.

show abstract

Photoproduction and relaxation of long-lived active charges inCa3Mn2Ge

Cited by 17 publications

References 16 publications

Polymeric compositions with hematite nanoparticles and organic compounds with charge transfer

Polymeric compositions with hematite nanoparticles and organic compounds with charge transfer

Photoinduced magnetization reversal in yttrium–iron garnets doped with silicon and cobalt

Ultrafast all-optical control of the magnetization in magnetic dielectrics

Contact Info

Product

Resources

About