搜索结果: 1-15 共查到“磁学 Magnetic”相关记录31条 . 查询时间(0.125 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Fast Magnetic Resonance Imaging and Inverse Problems
快速 磁共振成像 逆问题
2023/4/17
磁共振成像是目前医学成像技术中功能最强大，技术门槛最复杂的技术之一。然而，相对其他成像模态较为缓慢的采集速度（较长的扫描时间）制约了磁共振成像在临床上的广泛应用。借助采样样本的数量与扫描时间的正比关系，通过减少采集的数据量（稀疏采样）来缩短磁共振采集时间是磁共振成像领域的重要途径，而从高度欠采样的数据中重建出高质量的图像可以近似为一个病态反问题，对这一问题的求解是快速磁共振成像领域的研究热点。本次...
Physicists at the University of Illinois at Urbana-Champaign announced they have observed a magnetic phenomenon called the "anomalous spin-orbit torque," or ASOT, for the first time. The team's findin...
Scientists Find Surprising Magnetic Excitations in a Metallic Compound
Scientists Magnetic Excitations Metallic Compound
2016/6/12
Some three-dimensional materials can exhibit exotic properties that only exist in "lower" dimensions. For example, in one-dimensional chains of atoms that emerge within a bulk sample, electrons can se...
Scientists create ‘rewritable magnetic charge ice’
Scientists rewritable magnetic charge ice
2016/5/31
A team of scientists working at the U.S. Department of Energy’s (DOE) Argonne National Laboratory and led by Northern Illinois University physicist Zhili Xiao has created a ne...
Experiments show magnetic chips could dramatically increase computing’s energy efficiency
magnetic chips dramatically increase computing energy efficiency
2016/3/21
In a breakthrough for energy-efficient computing, UC Berkeley engineers have shown for the first time that magnetic chips can actually operate at the lowest fundamental energy dissipation theoret...
First-principles study on the magnetic properties in Mg dooped BiFeO3 with and without oxygen vacancies
Vacancies Magnesium Magnetic moments Antiferromagnetism Band gap
2016/12/2
The magnetic properties of Mg-doped BiFeO3 (BFO) with and without oxygen vacancies are studied through first-principles calculations. The Mg-doping prefers to occupy the ferromagnetic planes and produ...
Orbital occupation and magnetic moments of tetrahedrally coordinated iron in CaBaFe4O7
Orbital occupation magnetic moments tetrahedrally coordinated iron
2010/11/25
CaBaFe4O7 is a mixed-valent transition metal oxide having both Fe2+ and Fe3+ ions in tetrahedral coordination. Here we characterize its magnetic properties by magnetization measurements and investigat...
Influence of tetragonal distortion on the magnetic and electronic properties of the Heusler compound Co2TiSn from first principles
Influence of tetragonal distortion magnetic and electronic properties first principles
2010/11/22
Using the full potential linearized augmented plane wave plus local orbitals method we determine ab-initio the lattice parameters of tetragonally distorted Co2TiSn in the L21 structure. The tetragonal...
Magnetic and electrical properties of (Pu,Lu)Pd3
Magneti electrical properties (Pu,Lu)Pd3
2010/11/19
We present measurements of the magnetic susceptibility, heat capacity and electrical resistivity of Pu1−xLuxPd3, with x=0, 0.1, 0.2, 0.5, 0.8 and 1. PuPd3 is an antiferromagnetic
heavy fermion ...
Magnetic order, metamagnetic transitions, and low-temperature spin freezing in Ca2Co2O6: an NMR study
Magnetic order metamagnetic transitions low-temperature spin
2010/11/18
We report on a 59Co NMR investigation of the trigonal cobaltate Ca3Co2O6 carried out on a single crystal, providing precise determinations of the electric field gradient and chemical shift tensors, an...
Fast production of large 23Na Bose-Einstein condensates in an optically plugged magnetic quadrupole trap
optically plugged magnetic quadrupole trap
2010/11/18
We demonstrate a fast production of large 23Na Bose-Einstein condensates in an optically plugged,magnetic quadrupole trap. A single global minimum of the trapping potential is generated by slightly di...
Magnetic phase diagram of spatially anisotropic, frustrated spin-1/2 Heisenberg antiferromagnet on a stacked square lattice
Magnetic phase diagram of spatially anisotropic stacked square lattice
2010/11/17
Magnetic phase diagram of a spatially anisotropic, frustrated spin- 12 Heisenberg antiferromagnet on a stacked square lattice is investigated using second-order spin-wave expansion.
Baryon Magnetic Moments in Alternate 1/N_c Expansions
Baryon Magnetic Moments Alternate 1/N_c Expansions
2011/1/7
Recent work shows not only the necessity of a 1/Nc expansion to explain the observed mass
spectrum of the lightest baryons, but also that at least two distinct large Nc expansions, in which quarks tr...
Magnetic field induced reduction of the low-temperature superfluid density in cuprate superconductors
Magnetic field induced reduction cuprate superconductors
2010/11/18
The weak magnetic field induced reduction of the low-temperature superfluid density in cuprate
superconductors is studied based on the kinetic energy driven superconducting mechanism. The
electromag...
Competing magnetic interactions in CeNi9-xCoxGe4
Competing magnetic interactions CeNi9-xCoxGe4
2010/11/25
CeNi9Ge4 exhibits outstanding heavy fermion features with remarkable non-Fermiliquid behavior which is mainly driven by single-ion effects. The substitution of Ni by Cu causes a reduction of both, the...