scholarly journals Two-gap superconductivity inZrB12: Temperature dependence of critical magnetic fields in single crystals

2006 ◽  
Vol 73 (9) ◽  
Author(s):  
V. A. Gasparov ◽  
N. S. Sidorov ◽  
I. I. Zver’kova
Keyword(s):  
Magnetic Fields ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Critical Magnetic Fields

MAGNETORESISTANCE IN TOPOLOGICAL INSULATOR MnxBi2-xSe3 CRYSTALS

2013 ◽  
Vol 27 (15) ◽  
pp. 1362036 ◽  
Author(s):  
LI LV ◽  
MIN ZHANG ◽  
ZHANTAO WEI ◽  
LINQIN YANG ◽  
XISHENG YANG ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Temperature Dependence ◽  
Transport Properties ◽  
Single Crystals ◽  
Topological Insulator ◽  
Magnetic Impurities ◽  
High Concentration ◽  
Similar Temperature Dependence ◽  
Similar Temperature ◽  
Mr Effect

The transport properties of magnetic-atoms doped Mn x Bi 2-x Se 3 single crystals are studied. The samples exhibit approximately similar temperature dependence of resistivity behavior under various applied magnetic fields from zero to 9 T. Magnetoresistance (MR) is modified significantly by high concentration of Mn dopants. The scatterings mechanism between the magnetic impurities and electrons plays an important role in both transport properties and MR effect.

DISSIPATION OF THE Bi2.4-xPbxSr2CaCu2O8+y INTRINSIC ARRAY JOSEPHSON JUNCTIONS

2005 ◽  
Vol 19 (01n03) ◽  
pp. 479-481
Author(s):  
Y. NIE ◽  
Z. H. WANG ◽  
L. QIU ◽  
S. Y. DING ◽  
J. GAO
Keyword(s):  
Activation Energy ◽  
Magnetic Fields ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Field Dependence ◽  
Doping Level ◽  
Josephson Junctions ◽  
Irreversibility Line ◽  
Out Of Plane

We have fabricated a small-sized mesa on the surface of the Bi 2.4-x Pb x Sr 2 CaCu 2 O 8+y single crystals and measured the temperature dependence of the out-of-plane resistivity in different magnetic fields. The irreversibility line H irr( T ) follows different law in different temperature regions. But as a whole, the higher doping level x is, the irreversibility line locates in a higher field. The field dependence of activation energy follows U eff∝ H -m, m increases when doping level x improves.

OBSERVATION OF THE EXPONENTIAL TEMPERATURE DEPENDENCE OF THE TUNGSTEN SINGLE CRYSTAL MAGNETORESISTIVITY (PEIERLS' EXPONENT)

1993 ◽  
Vol 07 (01n03) ◽  
pp. 239-243
Author(s):  
V. V. MARCHENKOV ◽  
A. N. CHEREPANOV ◽  
V. E. STARTSEV
Keyword(s):  
Magnetic Fields ◽  
Single Crystal ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Power Function ◽  
Temperature Interval ◽  
Tungsten Single Crystal ◽  
Exponential Temperature Dependence ◽  
Transverse Magnetoresistivity ◽  
Corbino Disk

The transverse magnetoresistivity of ultrapure tungsten single crystals in Corbino disk form was measured in the temperature interval 4.2–50 K in magnetic fields up to 14 T. The exponential temperature dependence of the electroconductivity, predicted by Peierls and caused by the intersheet electron-phonon Umklapp processes, is discovered in the magnetoconductivity. When the intersheet Umklapp processes are "frozen-out" the temperature dependence of the magnetoconductivity is a power function.

Studies on the Temperature Stability of Pure and Doped Triglycine Sulphate Crystals Using TGA/DTA

2020 ◽  
Vol 10 (3) ◽  
pp. 206-212
Author(s):  
Vijeesh Padmanabhan ◽  
Maneesha P. Madhu ◽  
Supriya M. Hariharan
Keyword(s):  
Thermal Analysis ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Temperature Stability ◽  
Bandgap Energy ◽  
Dsc Analysis ◽  
Slow Cooling ◽  
As Doping ◽  
Similar Dependence ◽  
Temperature Ranges

Aim: To study the temperature stability of TGS doped with ZnSO4, CdCl2, BaCl2, and compare it with that of pure TGS. Objectives: Synthesizing pure and doped TGS and studying their temperature dependence using TGA, DTA, and DSC analysis. Methods: Slow cooling solution growth was used to grow single crystals of pure and doped TGS. The TGA, DTA and DSC analysis was conducted for determining the temperature stability. Results: The thermal analysis of pure and doped TGS shows that the doped samples show a similar dependence on temperature as pure TGS. The temperature of decomposition of pure and doped samples (BTGS, ZTGS, CdTGS) was 226.60°C, 228.38°C, 229.13°C, and 239.13°C respectively. The melting onset of these samples was 214.51°C, 216.04°C, 217.69°C and 216.04°C respectively. Conclusion: The study shows that doping TGS with the above three described materials did not alter their temperature stability considerably. It is a good result as doping TGS, for varying its characteristics like absorbance, reflectance, bandgap energy, etc., which did not alter its temperature stability. Therefore, TGS doped with the above three dopants can be used at the same temperature ranges as of pure TGS but with much-improved efficiency.

scholarly journals Modeling of magneto-conductivity of bismuth selenide: a topological insulator

2021 ◽  
Vol 3 (4) ◽  
Author(s):  
Yogesh Kumar ◽  
Rabia Sultana ◽  
Prince Sharma ◽  
V. P. S. Awana
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Single Crystal ◽  
Single Crystals ◽  
X Ray Diffraction ◽  
Field Range ◽  
X Ray ◽  
Bulk Carriers ◽  
Different Temperatures

AbstractWe report the magneto-conductivity analysis of Bi2Se3 single crystal at different temperatures in a magnetic field range of ± 14 T. The single crystals are grown by the self-flux method and characterized through X-ray diffraction, Scanning Electron Microscopy, and Raman Spectroscopy. The single crystals show magnetoresistance (MR%) of around 380% at a magnetic field of 14 T and a temperature of 5 K. The Hikami–Larkin–Nagaoka (HLN) equation has been used to fit the magneto-conductivity (MC) data. However, the HLN fitted curve deviates at higher magnetic fields above 1 T, suggesting that the role of surface-driven conductivity suppresses with an increasing magnetic field. This article proposes a speculative model comprising of surface-driven HLN and added quantum diffusive and bulk carriers-driven classical terms. The model successfully explains the MC of the Bi2Se3 single crystal at various temperatures (5–200 K) and applied magnetic fields (up to 14 T).

Pinning features of the magnetic flux trapped by YBCO single crystals in weak constant magnetic fields

2013 ◽  
Vol 39 (2) ◽  
pp. 107-110 ◽  
Author(s):  
V. Yu. Monarkha ◽  
V. A. Paschenko ◽  
V. P. Timofeev
Keyword(s):  
Magnetic Fields ◽  
Magnetic Flux ◽  
Single Crystals

Temperature dependence of the microhardness of beryllium single crystals and Be-Cu alloys

1975 ◽  
Vol 7 (10) ◽  
pp. 1251-1254
Author(s):  
S. S. Avotin ◽  
I. I. Papirov ◽  
G. F. Tikhinskii ◽  
A. D. Tkalenko ◽  
V. G. Tkachenko ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Single Crystals ◽  
Cu Alloys

Magnetic Anisotropy in Single Crystals of Zn–Mn and Zn–Cr

1974 ◽  
Vol 52 (18) ◽  
pp. 1759-1764 ◽  
Author(s):  
F. T. Hedgcock ◽  
S. Lenis ◽  
P. L. Li ◽  
J. O. Ström-Olsen ◽  
E. F. Wassermann
Keyword(s):  
Low Temperature ◽  
Magnetic Fields ◽  
Magnetic Anisotropy ◽  
Single Crystals ◽  
Crystal Field ◽  
Interaction Effects ◽  
Crystal Field Splitting ◽  
High Magnetic Fields ◽  
Field Splitting ◽  
Chromium Ion

We have extended the low temperature magnetic anisotropy measurements on single crystals of zinc containing up to 600 p.p.m. manganese from magnetic fields of 9 to 56 kG. The crystal field splitting parameters determined at low magnetic fields also characterizes the magnetic anisotropy at high magnetic fields. Manganese–manganese interaction effects are observed in the magnetic anisotropy at manganese concentrations greater than 300 p.p.m. Low temperature magnetic anisotropy measurements on single crystals of zinc containing up to 164 p.p.m. chromium are reported and indicate a crystal field splitting of 0.16 K for the chromium ion.

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