搜索结果: 91-105 共查到“知识库 磁学”相关记录137条 . 查询时间(5.505 秒)
Wang-Landau study of the triangular Blume-Capel ferromagnet
Wang-Landau study triangular Blume-Capel ferromagnet
2010/11/25
We report on numerical simulations of the two-dimensional Blume-Capel ferromagnet embedded
in the triangular lattice. The model is studied in both its first- and second-order phase transition regime ...
Issues with J-dependence in the LSDA+U method for non-collinear magnets
first-principles LDA+U non-collinear magnetism magnetocrystalline anisotropy
2010/11/18
We re-examine the commonly used density functional theory plus Hubbard U (DFT+U) method
for the case of non-collinear magnets. While many studies neglect to explicitly include the exchange correction...
Pinning of magnetic domain walls in multiferroics
Pinning of magnetic domain walls multiferroics
2010/11/22
The behavior of antiferromagnetic domain wall (ADW) against the background of a periodic ferroelectric domain structure has been investigated. It has been shown that the structure and the energy of AD...
Structure, Transport and Magnetic properties in La$_{2x}$Sr$_{2-2x}$Co$_{2x}$Ru$_{2-2x}$O$_{6}$
Structure Transport Magnetic properties
2010/11/22
The perovskite solid solutions of the type La2xSr2−2xCo2xRu2−2xO6 with 0.25 x 0.75 have been investigated for their structural, magnetic and transport properties.All the compounds cryst...
一种磁悬浮开关磁阻电机用轴向径向磁轴承
永磁偏置轴向径向磁轴承 等效磁路 参数设计 有限元分析
2011/10/25
为了克服现有永磁偏置轴向径向磁轴承的缺陷,研究了一种新型结构的磁悬浮开关磁阻电机用永磁偏置轴向径向磁轴承.分析其结构及工作原理,利用等效磁路法进行分析,得出了轴向悬浮力及径向悬浮力的数学模型,并对数学模型进行了线性化处理,得出了其轴向、径向位移刚度和电流刚度.给出了磁极面积、控制线圈安匝数、定转子结构等主要参数的设计方法,给出了样机参数,用有限元对样机进行了三维仿真分析.理论研究和仿真分析表明:该...
Towards T1-limited magnetic resonance imaging using Rabi beats
T1-limited magnetic resonance imaging Rabi beats
2010/10/18
Two proof-of-principle experiments towards T1-limited magnetic resonance imaging with NV cen-
ters in diamond are demonstrated. First, a large number of Rabi oscillations is measured and it is demons...
Squeezed vacuum reservoir effect for entanglement decay in nonlinear quantum scissors system
entanglement dynamics Kerr coupler squeezed vacuum reservoir
2010/10/18
We discuss the coupler system of two nonlinear oscillators excited by an external coherent field prepared in a maximally entangled state (Bell-like state). We show that as a result of the coupler inte...
A Note on Coriolis Quantum States
Landau quantum states Coriolis force gravito-magnetic theories Aharanov-Bohm effect Aharanov-Carmi phase
2010/10/20
We introduce the Coriolis quantum states in analogy to the Landau states. We discuss their physical meaning and their role within the context of gravito-magnetic theory. We also analyse the experiment...
Antiferromagnetism in a bosonic mixture of rubidium ($^{87}$Rb) and potassium ($^{41}$K)
Antiferromagnetism bosonic mixture rubidium ($^{87}$Rb) potassium ($^{41}$K)
2010/10/27
We simulate the experimental possibility of observing the antiferromagnetic (AF) order in the
bosonic mixtures of rubidium (87Rb) and potassium (41K) in a two-dimensional optical lattice in
the pres...
Stark-tuned Förster resonance and dipole blockade between 2 to 5 cold Rydberg atoms: Monte-Carlo simulations for various spatial configurations
Stark-tuned Fö rster resonance dipole blockade cold Rydberg atoms Monte-Carlo various spatial configurations
2010/10/18
Results of the numerical Monte-Carlo simulations for the Stark-tuned F¨orster resonance and dipole blockade between 2 to 5 cold rubidium Rydberg atoms in various spatial configurations are presented.E...
Storage of quantum coherences as phase labeled local polarization using magnetic field gradients in NMR
Storage of quantum coherences phase labeled local polarization magnetic field gradients
2010/10/18
Long decay times were previously observed in samples such as 29Si, C60,Y2O3 by applying multi-
pulse nuclear magnetic resonance sequences to measure decoherence times. They are originated in
stimula...
为了提升模式分类泛化性能，该文提出一种新颖的具有磁场效应的大间隔支持向量机(MFSVM)。为了学习最优分割超平面，MFSVM通过引入最小化的q-磁场带，使得一类(或正常类)被包含其中，而另一类(或异常类)与该q-磁场带的间隔尽可能地大，从而实现类内内聚性的提高和类间间隔的增大，增强SVM学习泛化能力。在人造和实际数据集上实验结果显示，MFSVM分别在二类和一类模式分类上的性能均优于或等同于相关方法...
为了提升模式分类泛化性能，该文提出一种新颖的具有磁场效应的大间隔支持向量机(MFSVM)。为了学习最优分割超平面，MFSVM通过引入最小化的q-磁场带，使得一类(或正常类)被包含其中，而另一类(或异常类)与该q-磁场带的间隔尽可能地大，从而实现类内内聚性的提高和类间间隔的增大，增强SVM学习泛化能力。在人造和实际数据集上实验结果显示，MFSVM分别在二类和一类模式分类上的性能均优于或等同于相关方法...
钴基玻璃包裹丝软磁性能的优化
玻璃包裹丝 软磁性能 优化
2010/8/17
采用高频感应加热熔融快淬法制备钴基玻璃包裹丝，研究了包裹丝的直径和退火电流密度对于巨磁阻抗效应（Giant Magnetoimpedance, GMI）和磁场灵敏度的影响.结果显示，随着包裹丝直径的增大，GMI和磁场灵敏度先增大后减小，当包裹丝总直径为29 μm时，软磁性能最好.用此直径的包裹丝进行不同电流密度的电流退火处理，发现当退火电流密度为120 A/mm2时，磁场灵敏度最高为602%/Oe...
趋磁细菌Magnetospirillum magneticum AMB-1全细胞和纯化磁小体的磁学比较研究
趋磁细菌AMB-1 纯化磁小体 磁滞回线 一阶反转曲线(FORC) Verwey转换 Moskowitz检验
2013/9/16
趋磁细菌磁小体化石是湖泊海洋沉积物的重要磁性载体和古环境替代性指标. 对纯培养趋磁细菌Magnetospirillum magneticum AMB-1的全细胞样品和纯化磁小体样品的磁学和电子显微镜分析结果表明: AMB-1合成的磁小体是单畴磁铁矿, 它们在胞内呈片段状的单链排列(由3~5条短链组成). 全细胞和纯化磁小体样品之间的磁学性质的显著差异主要由静磁相互作用(与磁小体的空间排列有关)造成...