Laser controlled magnetization in bulk Zn1–<i>x</i> Mn<i>x</i> Te

Khoi, Le Van; Avdonin, A.; Galazka, R. R.; Lentze, Michael J.; Kehl, Christian; Geurts, J.; Eyring, M.; Astakhov, G. V.; Ossau, W.

doi:10.1002/pssb.200675131

Physica Status Solidi (b)

2007

DOI: 10.1002/pssb.200675131

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Laser controlled magnetization in bulk Zn1–x Mnx Te

Le Van Khoi

A. Avdonin

R. R. Galazka

et al.

Abstract: Zn 1-x Mn x Te crystals (0 ≤ x ≤ 0.30) have been grown by the high pressure Bridgman technique. The free exciton energy of Zn 1-x Mn x Te was determined from the photoluminescence and reflectance measurements in the temperature range from 1.7 to 270 K. The magneto-photoluminescence and magneto-reflectance were studied at T = 1.7 K and in magnetic fields up to 6 T. The magnetization of Zn 1-x Mn x Te was calculated from the giant Zeeman effect. It was found that there is an efficient energy transfer channel fro… Show more

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Cited by 3 publications

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Photoelectric and photothermal investigations of Zn_1‐x‐yBe_xMn_ySe solid solutions

Firszt¹,

Strzałkowski²,

Zakrzewski³

et al. 2007

Cryst. Res. Technol.

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Zn 1-x-y Be x Mn y Se solid solutions were grown from the melt by the high pressure Bridgman method. Optical, luminescence, photoelectric and photothermal properties of this material were investigated. Interpretation of the piezoelectrically detected photoacoustic spectra was performed using Jackson and Amer theory. From the spectral dependence of the amplitude and phase of photoacoustic signal as well as from photoluminescence spectra the variation of energy gap with composition was determined. The values of thermal diffusivity were derived from the dependence of photoacoustic signal on modulation frequency of the laser radiation illuminating the sample. The photoluminescence-excitation spectra and photoconductivity spectra were measured. The origin of luminescence in Zn 1-x-y Be x Mn y Se was discussed.

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Photoelectric and photothermal investigations of Zn_1‐x‐yBe_xMn_ySe solid solutions

Firszt¹,

Strzałkowski²,

Zakrzewski³

et al. 2007

Cryst. Res. Technol.

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show abstract

A One-step, Template-free Synthesis, Characterization, Optical and Magnetic Properties of Zn_1−xMn_xTe Nanosheets

et al. 2008

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The Zn 1-x Mn x Te nanosheets were synthesized by the one-pot RAPET (reaction under autogenic pressure at elevated temperature) approach. The efficient replacement of Zn by Mn within the Zn 1-x Mn x Te lattice was confirmed from electron paramagnetic resonance (EPR) experiments. The (111) facets form the main surfaces of the ∼38 nm thick nanosheet structures. Mn catalyzes the formation of a small amount of nanorods (diameter ∼2.6 nm) alongside the nanosheet structures. The magnetic measurements (EPR and SQUID) confirm the +II state of manganese in all the products. Two local environments with strong parallel or antiparallel coupling of the Mn spins exist, specially in the case of Mn:Zn ) 0.01 (T1). T1 exhibits a relatively large magnetic moment of 0.12 µ B at µ 0 H ) 1.0 T and reflects the contribution of a paramagnetic phase (with antiferromagnetic interactions) and of a ferromagnetic phase. Variable temperature cathodoluminescence measurements were performed for all samples and showed distinct ZnTe near-band edge and Mn-related luminescence. An intense and broad intra-Mn 2+ transition at relatively large Mn alloy compositions of 10-15% is further consistent with an efficient incorporation of Mn within the host ZnTe lattice. The template-free formation of the nanosheets and nanorods are explained with the help of controlled experiments. From the technological point of view, the organization of the spintronic nanomaterials into 2D or 3D architectures is important for their assemblage onto a microscopic chip and the Zn 1-x Mn x Te nanosheets is a major breakthrough toward realization of such functionality.

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Optical characterization ofZn0.95−xBexMn0.05Semixed crystals

Dumcenco

Huang

et al. 2009

Phys. Rev. B

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A systematic study of a series of Zn 0.95−x Be x Mn 0.05 Se mixed crystals with different Be content ͑0.05Յ X Յ 0.20͒ grown by the modified high-pressure Bridgman method were carried out by room-temperature surface photovoltage spectroscopy ͑SPS͒, temperature-dependent photoluminescence ͑PL͒, and contactless electroreflectance ͑CER͒. A typical PL spectrum at low temperature consists of free exciton line, an edge emission due to recombination of shallow donor-acceptor pairs, and the Mn 2+ -related intraionic emission. The near bandedge transition energies determined by analyzing the CER and SPS spectra showed a blueshift with the increase in Be content. The peak positions of band-edge exciton features in the PL spectra shifted slightly toward lower energies as compared to the corresponding transition energies obtained from CER and SPS data. The observed increases in the CER-PL shift with the increasing of Be content are explained by the increasing compositional disorder causing the smearing of the band-edge energies. The excitonic line broadening for the samples with larger Be/Zn ratio are attributed in part to the alloy-scattering effects and also to the poorer crystalline quality of the samples with higher content of Be. In addition, the parameters that describe the temperature dependence of the transition energies and broadening parameters of the band-edge excitonic transitions were evaluated and discussed.

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Laser controlled magnetization in bulk Zn1–x Mnx Te

Cited by 3 publications

References 11 publications

Photoelectric and photothermal investigations of Zn_1‐x‐yBe_xMn_ySe solid solutions

Photoelectric and photothermal investigations of Zn_1‐x‐yBe_xMn_ySe solid solutions

A One-step, Template-free Synthesis, Characterization, Optical and Magnetic Properties of Zn_1−xMn_xTe Nanosheets

Optical characterization ofZn0.95−xBexMn0.05Semixed crystals

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Laser controlled magnetization in bulk Zn1–x Mnx Te

Cited by 3 publications

References 11 publications

Photoelectric and photothermal investigations of Zn1‐x‐yBexMnySe solid solutions

Photoelectric and photothermal investigations of Zn1‐x‐yBexMnySe solid solutions

A One-step, Template-free Synthesis, Characterization, Optical and Magnetic Properties of Zn1−xMnxTe Nanosheets

Optical characterization ofZn0.95−xBexMn0.05Semixed crystals

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Product

Resources

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Photoelectric and photothermal investigations of Zn_1‐x‐yBe_xMn_ySe solid solutions

Photoelectric and photothermal investigations of Zn_1‐x‐yBe_xMn_ySe solid solutions

A One-step, Template-free Synthesis, Characterization, Optical and Magnetic Properties of Zn_1−xMn_xTe Nanosheets