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Realignment of Slanted Fe Nanorods on Silicon Substrates by a strong magnetic field

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Nano Research 2010年第6期3卷 438-443页

作者： Yin Hu Zhengjun Zhang Qin Zhou Wei Liu Zhengcao Li Daqiao Meng Advanced Materials Laboratory Department of Materials Science and EngineeringTsinghua UniversityBeijing 100084China National Key Laboratory for Surface Physics and Chemistry MianyangSichuan 621907China

Slanted Fe nanorods prepared by glancing angle deposition on silicon substrates exhibited easy magnetization along their growth axis. By using a thin gold film on a silicon substrate as a buffer layer, slanted Fe nanorods can be realigned towards the substrate surface normal by a strong magnetic field. After realignment, the Fe nanorods retained the easy magnetization axis along their growth axis. The effects of the realignment by the strong magnetic field on the properties of the slanted Fe nanorods were also investigated. This study provides a possible way to fabricate magnetic nanostructures for perpendicular recording applications.

关键词： Glancing angle deposition Fe nanorods easy magnetization axis strong magnetic field reorientation

Statistic properties of Fermi gas in a strong magnetic field

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Chinese Physics B 2010年第3期19卷 108-111页

作者：门福殿范召兰 College of Physics Science and Technology China University of Petroleum(East China)

Based on the thermodynamic potential function of Fermi gas in a strong magnetic field, using the thermodynamics method, the integrated analytical expressions of thermodynamic quantities of the system at low temperatures are derived, and the effects of the magnetic field on the statistic properties of the system are analysed. It is shown that, as long as the temperature is not zero, the effects of the magnetic field on the thermodynamic quantities of the system contain both oscillatory and non-oscillatory parts. For the non-oscillatory part, compared with the situation of Fermi gas in a weak magnetic field, the influence of the magnetic field on the thermodynamic quantities is not exactly the same. For the oscillatory part, the period and amplitude of the oscillation are all related to the magnetic field. Due to the oscillation, the chemical potential may be greater than Ferim energy of the system, but the oscillation does not affect the thermodynamic stability of the system.

关键词： strong magnetic field Fermi gas statistic property

Effect of strong magnetic field on isothermal transformation of degenerate pearlite in an Fe-C-Mo alloy

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Acta Metallurgica Sinica(English Letters) 2010年第4期23卷 248-254页

作者： Zhenni ZHOU Cuohong ZHANG Kaiming WU Hubei Province Key Laboratory of Systems Science in Metallurgical Processing Institute of Advanced Steels and Welding Technology Wuhan University of Science and Technology Wuhan 430081 China

The pearlite transformation in a Mo-containing iron alloy was investigated under 12 T magnetic field. The pearlite transformation was accelerated owing to the application of a strong magnetic field. Pearlite was of degenerated morphology without the presence of a strong magnetic field; but the degeneracy of pearlite is reduced when a strong magnetic field was applied, which may be attributed to the effect of strong magnetic field on faster carbon diffusion and less molybdenum segregation caused by a strong magnetic

关键词： field Steels Pearlite Phase transformation strong magnetic field

Effect of strong magnetic field on chemical potential and electron capture in magnetar

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Chinese Physics B 2010年第9期19卷 660-663页

作者：高杰罗志全刘伟伟李港 Institute of Theoretical Physics China West Normal University

The chemical potential of electrons in a strong magnetic field is investigated. It is shown that the magnetic field has only a slight effect on electron chemical potential when B 〈 10^11 T, but electron chemical potential will decrease greatly when B 〉 10^11 T. The effects of a strong magnetic field on electron capture rates for ^60Fe are discussed, and the result shows that the electron capture sharply decreases because of the strong magnetic field.

关键词： strong magnetic field electron chemical potential electron capture magnetar

The role of Debye mass in the chiral crossover in a strong magnetic field

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Communications in Theoretical Physics 2022年第10期74卷 68-75页

作者： Jia Zhang Xin-Jian Wen Institute of Theoretical Physics State Key Laboratory of Quantum Optics and Quantum Optics DevicesShanxi UniversityTaiyuanShanxi 030006China

In this paper,the Debye mass of quarks is investigated in the Nambu–Jona-Lasinio model at zero and nonzero chemical *** a uniform plasma,the Debye mass usually behaves as a monotonous increasing function of the temperature,the chemical potential and the magnetic *** the fixed coupling interaction G,we find that the magnetic catalysis(MC)on the occurrence of the chiral restoration could be revealed by the susceptibility of the Debye mass dmD/dT at low chemical potential and by the quantity TdmD/dT in the region of moderate ***,the inverse MC is realized under a thermomagnetic coupling constant G(B,T)by the behavior of the Debye mass at both zero and nonzero chemical potentials.

关键词： chiral restoration strong magnetic field Debye mass Nambu-Jona-Lasinio

Progress in Research of Solidification of Metals Under a strong magnetic field

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Journal of Iron and Steel Research(International) 2012年第S1期19卷 18-24页

作者： REN Zhong-ming Department of Material Science and Engineering Shanghai University Key Lab.of Modem Metallurgy and Processing of Materials of Shanghai

Solidification of metals under a strong magnetic field is a new area for ***,some progress in the area is reviewed along with presentation of the fundamental effects of magnetic *** is paid on the subjects of influence of a magnetic field on kinetics of solidification,instability of S/L interface,crystal growth of monophase alloy, eutectic growth,thermoelectrical magnetic convection and its effects,The core problems which should be investigated deeply and the key parameters needed are discussed.

关键词： solidification metal strong magnetic field magnetic force crystal growth alloy

Columnar-to-Equiaxed Transition During Directional Solidification Under strong magnetic field

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Journal of Iron and Steel Research(International) 2012年第S2期19卷 1044-1047页

作者： LI Xi DU Da-fan Annie GAGNOUD Yves FAUTRELLE REN Zhong-ming Department of Material Science and Engineering Shanghai University SIMAP-EPM-Madylam/CNRS ENSHMG

Effects of strong magnetic fields on the columnar-to-equiaxed transition(CET) have been investigated *** results show that the application of a strong magnetic field causes a dendrite fragmentation and then the *** thermoelectric magnetic force acting on cells/dendrites and equiaxed grains in the mushy zone has been studied *** results reveal that a torque is created on cells/dendrites and equiaxed grains and the value of the thermoelectric magnetic force increases as the magnetic field intensity *** torque breaks cells/dendrites and drives the rotation of equiaxed *** a consequence,the CET will occur during directional solidification under a strong magnetic *** may initiate a new method to induce the CET via an applied strong magnetic field during directional solidification.

关键词： columnar-to-equiaxed transition strong magnetic field directional solidification

An effective potential method for the calculation of hydrogen molecule ion energy in a strong magnetic field

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Chinese Physics B 2002年第5期11卷 467-471页

作者：焦志勇李毓成 DepartmentofAppliedPhysics UniversityofPetroleumDongying257061China DepartmentofPhysics LiaoningUniversityShenyang110036China

Using the adiabatic approximation and adiabatic variational approximation with an effective potential, the totalenergies and the equilibrium internuclear separations of H2+ ion in states σg, πu, δg, φu, γg, ηu in strong magnetic fieldshave been calculated. Our results reproduced those obtained by Vincke and Baye (Vincke M and Baye D 1985 J. Phys.B: At. Mol. Phys. 18 167), which are considered the most reliable. We found a basic function with better convergencethan the Landau functions.

关键词： strong magnetic field effective potential method hydrogen molecule ion adiabatic vari-ational approximation

Solidification of Hyper-Monotectic Zinc-Bismuth Alloy in a strong magnetic field

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Journal of Iron and Steel Research(International) 2012年第S1期19卷 282-285页

作者： ZHONG Yun-bo WANG Jiang ZHENG Tian-xiang F.Debray Y.Fautrelle Shanghai University LNCMI CNRS/UJF/INSA/UPS38042 GrenobleFrance SIMAP EPMCNRSGrenobleFrance

In order to obtain homogenous Zn-Bi hyper-monotectic alloys and investigate what mechanism the magnetic field functions,we carried out the solidification experiments of Zn-4wt%Bi,5wt%Bi,6wt%Bi,7wt%Bi, 15wt%Bi and 30wt%Bi alloys under a 18T static magnetic field which was set up in *** quenching was also chosen to further damp the segregation caused by Stokes convection and Marangoni *** results indicated that when the content of Bismuth is 5-7wt%,the superimposition of 18Tesla magnetic field can damp the segregation remarkably,and the size of the second phase particles also is ***,to Zn-4wt%Bi alloy solidified in 18T magnetic field,no spherical bismuth particles are found even magnifying 1000 times by microscope, which hints that the 18T magnetic field may change its solidifying *** Zn-15wt%Bi and Zn-30wt%Bi alloy, due to their strong segregation trend,the 18T magnetic field still cannot damp the Stokes settlement thoroughly even by quenching way,however,no layered bismuth and zinc appears when compared to 0T,large Bismuth block are formed in the lower half part of the sample.

关键词： strong magnetic field hyper-monotectic alloy segregation microstructure