scholarly journals Influence of doping by tin, tallium and copper on quantum mobility of holes in antimony telluride single crystals

2020 ◽  
Vol 97 (1) ◽  
pp. 26-34
Author(s):  
Zh.T. Ismailov ◽  
◽  
V.A. Kulbachinskii ◽  
Keyword(s):  
Magnetic Field ◽  
Single Crystals ◽  
Oscillation Frequency ◽  
Bridgman Method ◽  
Antimony Telluride ◽  
Cu Doping ◽  
Cu Content ◽  
Sdh Oscillations ◽  
The Magnetic Field

In this work we report the results of the extraction of quantum mobilty μq of holes from the Shubnikov – de Haas (SdH) effect at T = 4.2 K in single crystals Sb2–xSnxTe3 (x = 0.0; 0.005; 0.0075; 0.01); Sb2–xTlxTe3 (x = 0.0; 0.005; 0.015; 0.05) and Sb2–xCuxTe3(x = 0.0; 0.01; 0.03; 0.05; 0.07; 0.10), samples synthesized by the Bridgman method. Tl exhibits donor properties in Sb2Te3 while Sn and Cu show an acceptor behavior. Quantum mobility of holes, evaluated from SdH oscillations, decreases under doping in Sn doped samples about two times, in Tl doped samples about three times and in Cu doped samples less than two times at maximal Cu content x = 0.1. At the same time maximal Cu doping is 6 times (as compared with Sn) and 2 times (as compared with Tl) more. All measurements were made to Orient the magnetic field along the C3 axis. In this case, for the six-ellipsoid surface of Fermi light holes, all sections of ellipsoids coincide, and only one oscillation frequency is observed.

Orientation dependence of the magnetic field distributions in large single crystals of

2006 ◽  
Vol 374-375 ◽  
pp. 225-228 ◽  
Author(s):  
W.J. Kossler ◽  
A.J. Greer ◽  
R.N. Dickes ◽  
D. Sicilia ◽  
Y. Dai
Keyword(s):  
Magnetic Field ◽  
Single Crystals ◽  
Orientation Dependence ◽  
Field Distributions ◽  
The Magnetic Field

Crystal Perfection of Silicon Single Crystals Grown by the Magnetic‐Field‐Applied Czochralski Method

1986 ◽  
Vol 133 (1) ◽  
pp. 171-174 ◽  
Author(s):  
Seiji Kawado ◽  
Toshiyuki Maruyama ◽  
Toshihiko Suzuki ◽  
Nobuyuki Isawa ◽  
Kinji Hoshi
Keyword(s):  
Magnetic Field ◽  
Single Crystals ◽  
Czochralski Method ◽  
Crystal Perfection ◽  
The Magnetic Field

Growth and properties of InP single crystals grown by the magnetic field applied LEC method

1986 ◽  
Vol 79 (1-3) ◽  
pp. 291-295 ◽  
Author(s):  
H. Miyairi ◽  
T. Inada ◽  
M. Eguchi ◽  
T. Fukuda
Keyword(s):  
Magnetic Field ◽  
Single Crystals ◽  
The Magnetic Field

Synthesis and spectroscopic properties of LiIn(WO4)2 nanopowders and single crystals doped with chromium(III) ions

Open Physics ◽  
2013 ◽  
Vol 11 (11) ◽  
Author(s):  
Tomasz Skibiński ◽  
Hubert Fuks ◽  
Sławomir Kaczmarek ◽  
Tomasz Bodziony ◽  
Krzysztof Hermanowicz ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Single Crystals ◽  
Spectroscopic Data ◽  
High Field ◽  
Spectroscopic Properties ◽  
Epr Spectra ◽  
Higher Spin ◽  
Field Lines ◽  
The Magnetic Field

AbstractLiIn(WO4)2 single crystals and nanopowders doped with chromium(III) ions were synthesized and investigated, including their EPR spectra and magnetic properties. The EPR spectra have shown low and high field lines attributed to isolated chromium ions with an electron spin S=3/2 and complex chromium centers with higher spin value, respectively. Magnetic susceptibility measurements revealed an almost linear dependence on the magnetic field. The electron resonance and magnetic properties have been related to the structural and spectroscopic data of the studied material.

Study of the Effect of Cation Non-Stoichiometry of (La0.85Sr0.15)yMnO3 Manganite Single Crystals on the Magnetic Properties

2012 ◽  
Vol 194 ◽  
pp. 108-111
Author(s):  
Dmitry Shulyatev ◽  
Mariya Lyange ◽  
Anna Pestun ◽  
Yakov M. Mukovskii ◽  
Eun Sang Choi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Electron Transport ◽  
Single Crystals ◽  
Orbital Ordering ◽  
Electron Transport Properties ◽  
Mn Content ◽  
Ferromagnetic Ordering ◽  
Two Peaks ◽  
The Magnetic Field

The influence of cation inhomogeneity on magnetic and electron transport properties of (La0.85Sr0.15)yMnO3 (y=0.92-0.97) single crystals were studied. It was found that both the temperature of ferromagnetic ordering TC and the temperature of orbital ordering TOO are increased with the Mn content decreasing. For all six samples studied two peaks on magnetoresistance curves were observed: the first near TC and the second close to TOO. The magnetic field does not affect the position of the former maximum, while it moves the latter towards lower temperatures.

scholarly journals Magneto – thermoelectric effects in quantum well in the presence of electromagnetic wave

2017 ◽  
Vol 33 (2) ◽  
Author(s):  
Nguyen Quang Bau ◽  
Dao Thu Hang ◽  
Doan Minh Quang ◽  
Nguyen Thi Thanh Nhan
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Wave ◽  
Quantum Well ◽  
Quantum Kinetic Equation ◽  
Thermoelectric Effects ◽  
Parabolic Potential ◽  
Bulk Semiconductors ◽  
Sdh Oscillations ◽  
Analytic Expression ◽  
The Magnetic Field

Abstract. We have studied magneto-thermoelectric effects in quantum well in the presence of electromagnetic wave. The analytic expression for Ettingshausen coefficient (EC) in the Quantum Well with parabolic potential (QWPP) in the presence of Electromagnetic wave (EMW) is calculated by using the quantum kinetic equation for electrons. The dependence of EC on the frequency, the amplitude of EMW, the Quantum Well parameters and the temperature are obtained. The results are numerically calculated, plotted, and discussed for GaAs/GaAsAl Quantum Well to clearly show the dependence of EC on above parameters and the results in this case are compared with the case in the bulk semiconductors. We realize that as the temperature increases, the EC decreases. The results show appearance of the Shubnikov–de Haas (SdH) oscillations when we survey the dependence of EC on the magnetic field.  Keywords:  Ettingshausen, Quantum well, Electromagnetic wave, parabolic potential, GaAs/GaAsAl.

Magnetic Shape Memory - Polymer Hybrids

2016 ◽  
Vol 879 ◽  
pp. 133-138 ◽  
Author(s):  
Ilkka Aaltio ◽  
Frans Nilsén ◽  
Joonas Lehtonen ◽  
Yan Ling Ge ◽  
Steven Spoljaric ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Shape Memory ◽  
Single Crystals ◽  
Magnetic Particles ◽  
Shape Change ◽  
Shape Memory Polymer ◽  
Raw Material ◽  
Magnetic Shape Memory ◽  
Polymer Hybrids ◽  
The Magnetic Field

Martensitic Ni-Mn-Ga based alloys are known for the Magnetic Shape Memory (MSM) effect, which upon application of an external magnetic field can generate a strain up to 12 % depending on the microstructure of the martensite. The MSM effect occurs by rearrangement of the martensite variants, which is most advantageous in single crystals. Single crystals are, however, rather tedious to produce and there has been attempts to achieve MSM effect in polycrystals. However, in polycrystals the magnetic field induced shape change remains low as compared to single crystals. As an alternative to the former, hybrid MSM materials offer several advantages. When compared to single crystals, hybrids have extended freedom of shaping, lower raw material price, relatively large MSM strain and easier manufacturability. Embedding MSM particles into a suitable polymer matrix results in actuation function or good vibration damping performance. In the present study we report on the mechanical, structural and magnetic properties of MSM polymer hybrids, which are prepared by mixing gas-atomized Ni-Mn-Ga MSM powder into epoxy matrix and aligning the magnetic particles in a magnetic field.

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