The Experts below are selected from a list of 3111 Experts worldwide ranked by ideXlab platform
Jianmin Yan - One of the best experts on this subject based on the ideXlab platform.
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anomalous hall effect in two dimensional non collinear antiferromagnetic semiconductor cr0 68se
Applied Physics Letters, 2017Co-Authors: Jianmin Yan, Xuan Luo, Fangchu Chen, Qijun Pei, Gaoting Lin, Yunhu Han, P TongAbstract:Cr0.68Se single crystals with two-dimensional (2D) character have been grown, and the detailed magnetization M(T), electrical transport properties (including longitudinal resistivity ρxx and Hall resistivity ρxy), and thermal transport properties [including Heat Capacity Cp(T) and thermoelectric power S(T)] have been measured. There are some interesting phenomena: (i) Cr0.68Se presents a non-collinear antiferromagnetic (AFM) semiconducting behavior at the Neel temperature of TN = 42 K and with the activated energy of Eg = 3.9 meV; (ii) it exhibits the anomalous Hall effect (AHE) below TN and large negative magnetoresistance about 83.7% (2 K, 8.5 T). The AHE coefficient RS is 0.385 cm−3/C at T = 2 K, and the AHE conductivity σH is about 1 Ω−1 cm−1 at T = 40 K; (iii) the scaling behavior between the anomalous Hall resistivity ρxyA and the longitudinal resistivity ρxx is linear, and further analysis implies that the origin of the AHE in Cr0.68Se is dominated by the skew-scattering mechanism. Our results may ...
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anomalous hall effect in two dimensional non collinear antiferromagnetic semiconductor cr0 68se
arXiv: Materials Science, 2017Co-Authors: Jianmin Yan, Xuan Luo, Fangchu Chen, Qijun Pei, Gaoting Lin, Yunhu Han, P TongAbstract:Cr0.68Se single crystals with two-dimensional (2D) character have been grown, and the detailed magnetization M(T), electrical transport properties (including longitudinal resistivity and Hall resistivity and thermal transport ones (including Heat Capacity Cp(T) and thermoelectric power (TEP) S(T)) have been measured. There are some interesting phenomena: (i) Cr0.68Se presents a non-collinear antiferromagnetic (AFM) semiconducting behavior with the Neel temperature TN = 42 K and the activated energy Eg=3.9 meV; (ii) It exhibits the anomalous Hall effect (AHE) below TN and large negative magnetoresistance (MR) about 83.7% (2 K, 8.5 T). The AHE coefficient RS is 0.385 cm-3/C at T=2 K and the AHE conductivity {\sigma}H is about 1 ohm-1cm-1 at T=40 K, respectively; (iii) The scaling behavior between the anomalous Hall resistivity and the longitudinal resistivity is linear and further analysis implies that the origin of the AHE in Cr0.68Se is dominated by the skew-scattering mechanism. Our results may be helpful for exploring the potential application of these kind of 2D AFM semiconductors.
Dongsheng Wen - One of the best experts on this subject based on the ideXlab platform.
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effect of al2o3 nanoparticle dispersion on the specific Heat Capacity of a eutectic binary nitrate salt for solar power applications
Energy Conversion and Management, 2017Co-Authors: Yanwei Hu, Yurong He, Zhenduo Zhang, Dongsheng WenAbstract:Molten salts can be used as Heat transfer fluids or thermal storage materials in a concentrated solar power plant. Improving the thermal properties can influence the utilization efficiency of solar energy. In this study, the effect of doping eutectic binary salt solvent with Al2O3 nanoparticles on its specific Heat Capacity (Cp) was investigated. The effects of the mass fraction of nanoparticles on the Cp of the composite nanofluid were analyzed, using both differential scanning calorimetry measurements and molecular dynamics simulations. The specific Heat Capacity of the nanocomposites was enhanced by increasing the nanoparticle concentration. The maximum enhancement was found to be 8.3%, at a nanoparticle concentration of 2.0%. A scanning electron microscope was used to analyze the material morphology. It was observed that special nanostructures were formed and the specific Heat Capacity of the nanocomposites was enhanced by increasing the quantity of nanostructures. Simulation results of Cp agreed well with the experimental data, and the potential energy and interaction energy in the system were analyzed. The change in Coulombic energy contributed to most of the large change in Cp, which explains the discrepancy in values between conventional nanofluids and molten salt-based nanofluids.
Quan Shi - One of the best experts on this subject based on the ideXlab platform.
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low temperature Heat Capacity and standard molar enthalpy of formation of crystalline 2 pyridinealdoxime c6h6n2o
The Journal of Chemical Thermodynamics, 2007Co-Authors: Quan Shi, Zhicheng Tan, Bo Tong, Zhiheng Zhang, Julan ZengAbstract:Abstract The thermodynamic properties of 2-pyridinealdoxime were investigated through the thermogravimetric (TG) analysis and differential scanning calorimetry (DSC). Low-temperature Heat Capacity Cp,m of 2-pyridinealdoxime (C6H6N2O; CAS 873-69-8) was measured in the temperature range from (80 to 373) K with a high precision automated adiabatic calorimeter. No phase transition or thermal anomaly was observed in this range. The thermodynamic functions [HT − H298.15] and [ST − S298.15] were calculated in the range from (80 to 375) K. The constant-volume energy and standard molar enthalpy of combustion have been determined, Δ c U ( C 6 H 6 N 2 O,cr ) = Δ c H m ∘ (C6H6N2O, cr) = − (3297.11 ± 1.53) kJ · mol−1 (based on Δn being zero in reaction of the combustion), by means of a precision oxygen-bomb combustion calorimeter at T = (298.15 ± 0.001) K. The standard molar enthalpy of formation has been derived, Δ f H m ∘ (C6H6N2O, cr) = (78.56 ± 2.43) kJ · mol−1, from the standard molar enthalpy of combustion in combination with other auxiliary thermodynamic quantities through a Hess thermochemical cycle.
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Heat Capacity and standard molar enthalpy of formation of crystalline 2 6 dicarboxypyridine c7h5no4
The Journal of Chemical Thermodynamics, 2006Co-Authors: Quan Shi, Zhicheng Tan, Bo Tong, Lixian Sun, Zhiheng Zhang, Tao ZhangAbstract:Abstract Low-temperature Heat Capacity Cp,m of 2,6-dicarboxypyridine (C7H5NO4; CAS 499-83-2) was precisely measured in the temperature range from (80 to 378) K with a high precision automated adiabatic calorimeter. No phase transition or thermal anomaly was observed in this range. The thermodynamic functions [HT − H298.15] and [ST − S298.15] were calculated in the range from (80 to 378) K. The standard molar enthalpy of combustion and the standard molar enthalpy of formation of the compound have been determined, Δ c H m ∘ ( C 7 H 5 NO 4 , cr ) = - ( 2741.41 ± 0.49 ) kJ · mol - 1 and Δ f H m ∘ ( C 7 H 5 NO 4 , cr ) = - ( 727.74 ± 1.50 ) kJ · mol - 1 , by means of a precision oxygen-bomb combustion calorimeter at T = 298.15 K. The thermodynamic properties of the compound were further investigated through differential scanning calorimeter (DSC) and the thermogravimetric (TG) analysis.
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molar Heat Capacity and thermodynamic properties of 4 methyl 4 cyclohexene 1 2 dicarboxylic anhydride c9h10o3
Journal of Chemical & Engineering Data, 2005Co-Authors: Zhicheng Tan, Quan Shi, Lixian Sun, Hongtao Zhang, Tao ZhangAbstract:The molar Heat Capacity Cp,m of 4-methyl-4-cyclohexene-1,2-dicarboxylic anhydride was measured over the temperature range from T = 80 K to T = 361 K with a small-sample automated adiabatic calorimeter. The melting point Tm and the molar enthalpy ΔfusHm and entropy ΔfusSm of fusion for the compound were determined to be (335.54±0.41) K, (17.67±0.04) kJ·mol-1, and (52.65±0.04) J·K-1·mol-1, respectively. Thermodynamic functions [HT − H298.15] and [ST − S298.15] were derived in the temperature range from T = 80 K to T = 361 K with a temperature interval of 5 K. The purity of the sample in mole fraction used in the adiabatic calorimetry study was determined to be 0.9940 by using the fractional melting technique. The thermal stability of the compound was investigated by differential scanning calorimetry (DSC) and a thermogravimetric (TG) technique, and the process of the mass loss of the sample was due to evaporation instead of thermal decomposition.
P Tong - One of the best experts on this subject based on the ideXlab platform.
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anomalous hall effect in two dimensional non collinear antiferromagnetic semiconductor cr0 68se
Applied Physics Letters, 2017Co-Authors: Jianmin Yan, Xuan Luo, Fangchu Chen, Qijun Pei, Gaoting Lin, Yunhu Han, P TongAbstract:Cr0.68Se single crystals with two-dimensional (2D) character have been grown, and the detailed magnetization M(T), electrical transport properties (including longitudinal resistivity ρxx and Hall resistivity ρxy), and thermal transport properties [including Heat Capacity Cp(T) and thermoelectric power S(T)] have been measured. There are some interesting phenomena: (i) Cr0.68Se presents a non-collinear antiferromagnetic (AFM) semiconducting behavior at the Neel temperature of TN = 42 K and with the activated energy of Eg = 3.9 meV; (ii) it exhibits the anomalous Hall effect (AHE) below TN and large negative magnetoresistance about 83.7% (2 K, 8.5 T). The AHE coefficient RS is 0.385 cm−3/C at T = 2 K, and the AHE conductivity σH is about 1 Ω−1 cm−1 at T = 40 K; (iii) the scaling behavior between the anomalous Hall resistivity ρxyA and the longitudinal resistivity ρxx is linear, and further analysis implies that the origin of the AHE in Cr0.68Se is dominated by the skew-scattering mechanism. Our results may ...
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anomalous hall effect in two dimensional non collinear antiferromagnetic semiconductor cr0 68se
arXiv: Materials Science, 2017Co-Authors: Jianmin Yan, Xuan Luo, Fangchu Chen, Qijun Pei, Gaoting Lin, Yunhu Han, P TongAbstract:Cr0.68Se single crystals with two-dimensional (2D) character have been grown, and the detailed magnetization M(T), electrical transport properties (including longitudinal resistivity and Hall resistivity and thermal transport ones (including Heat Capacity Cp(T) and thermoelectric power (TEP) S(T)) have been measured. There are some interesting phenomena: (i) Cr0.68Se presents a non-collinear antiferromagnetic (AFM) semiconducting behavior with the Neel temperature TN = 42 K and the activated energy Eg=3.9 meV; (ii) It exhibits the anomalous Hall effect (AHE) below TN and large negative magnetoresistance (MR) about 83.7% (2 K, 8.5 T). The AHE coefficient RS is 0.385 cm-3/C at T=2 K and the AHE conductivity {\sigma}H is about 1 ohm-1cm-1 at T=40 K, respectively; (iii) The scaling behavior between the anomalous Hall resistivity and the longitudinal resistivity is linear and further analysis implies that the origin of the AHE in Cr0.68Se is dominated by the skew-scattering mechanism. Our results may be helpful for exploring the potential application of these kind of 2D AFM semiconductors.
Fangchu Chen - One of the best experts on this subject based on the ideXlab platform.
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anomalous hall effect in two dimensional non collinear antiferromagnetic semiconductor cr0 68se
Applied Physics Letters, 2017Co-Authors: Jianmin Yan, Xuan Luo, Fangchu Chen, Qijun Pei, Gaoting Lin, Yunhu Han, P TongAbstract:Cr0.68Se single crystals with two-dimensional (2D) character have been grown, and the detailed magnetization M(T), electrical transport properties (including longitudinal resistivity ρxx and Hall resistivity ρxy), and thermal transport properties [including Heat Capacity Cp(T) and thermoelectric power S(T)] have been measured. There are some interesting phenomena: (i) Cr0.68Se presents a non-collinear antiferromagnetic (AFM) semiconducting behavior at the Neel temperature of TN = 42 K and with the activated energy of Eg = 3.9 meV; (ii) it exhibits the anomalous Hall effect (AHE) below TN and large negative magnetoresistance about 83.7% (2 K, 8.5 T). The AHE coefficient RS is 0.385 cm−3/C at T = 2 K, and the AHE conductivity σH is about 1 Ω−1 cm−1 at T = 40 K; (iii) the scaling behavior between the anomalous Hall resistivity ρxyA and the longitudinal resistivity ρxx is linear, and further analysis implies that the origin of the AHE in Cr0.68Se is dominated by the skew-scattering mechanism. Our results may ...
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anomalous hall effect in two dimensional non collinear antiferromagnetic semiconductor cr0 68se
arXiv: Materials Science, 2017Co-Authors: Jianmin Yan, Xuan Luo, Fangchu Chen, Qijun Pei, Gaoting Lin, Yunhu Han, P TongAbstract:Cr0.68Se single crystals with two-dimensional (2D) character have been grown, and the detailed magnetization M(T), electrical transport properties (including longitudinal resistivity and Hall resistivity and thermal transport ones (including Heat Capacity Cp(T) and thermoelectric power (TEP) S(T)) have been measured. There are some interesting phenomena: (i) Cr0.68Se presents a non-collinear antiferromagnetic (AFM) semiconducting behavior with the Neel temperature TN = 42 K and the activated energy Eg=3.9 meV; (ii) It exhibits the anomalous Hall effect (AHE) below TN and large negative magnetoresistance (MR) about 83.7% (2 K, 8.5 T). The AHE coefficient RS is 0.385 cm-3/C at T=2 K and the AHE conductivity {\sigma}H is about 1 ohm-1cm-1 at T=40 K, respectively; (iii) The scaling behavior between the anomalous Hall resistivity and the longitudinal resistivity is linear and further analysis implies that the origin of the AHE in Cr0.68Se is dominated by the skew-scattering mechanism. Our results may be helpful for exploring the potential application of these kind of 2D AFM semiconductors.
