This equation shows that the electron, in addition to the magnetic moment due to its orbital motion, has a magnetic moment due to its spin angular momentum equal to μBσ where μB ~q = is the Bohr magneton. We need also the following result. Let’s consider the Dirac equation for an electron in a spherically symmetric potential:
Non-relativistic torque and Edelstein effect in non-collinear …
Sep 3, 2024 · Using group symmetry analysis, model calculations, and realistic simulations on selected compounds, we identify large classes of non-collinear magnet candidates and demonstrate that the...
VASP计算非线性磁矩和磁各向异性能（自旋轨道耦合）小结_vasp …
Oct 2, 2020 · 会自动打开LNONCOLLINEAR= .TRUE.选项，且自旋轨道计算只适用于PAW赝势，不适于超软赝势。 自旋轨道耦合效应就意味着能量对磁矩的方向存在依赖，即存在磁各向异 性能 （MAE），所以要定义初始磁矩的方向。 如下： LSORBIT = .TRUE. 默认值： SAXIS= (0+,0,1)，即x方向有正的无限小的磁矩，Z方向有磁矩。 两种方法原则上应该是等价的，但是实际上第二种方法更精确。 第二种方法允许读取已存在的WA.VECAR（来自线性或者非磁性计 …
Noncollinear magnetic order in quasicrystals - PubMed
Aug 13, 2004 · It is demonstrated that the superposition of geometric frustration with the quasiperiodic ordering leads to a three-dimensional noncollinear antiferromagnetic spin structure. The structure can be divided into several ordered interpenetrating magnetic supertilings of different energy and characteristic wave vector.
LNONCOLLINEAR - VASP Wiki
In practice, we recommend performing noncollinear calculations in two steps: First, calculate the nonmagnetic ground state and generate a WAVECAR and a CHGCAR file. Second, read the WAVECAR and CHGCAR file, and supply initial magnetic moments using the MAGMOM tag.
Noncollinear magnetic structure and anisotropic magnetoelastic coupling ...
Oct 14, 2019 · After symmetry analysis and magnetic structure refinement, we demonstrate that possesses a complicated noncollinear magnetic ground state with Co moments mainly located in the b-c plane and forming a noncollinear spin-chain-like structure along the c -axis.
Moment direction of noncollinear antiferromagnetic TbNiC2
Mar 1, 1995 · In the present work, the neutron-diffraction experiments are carried out on the powdered and single-crystalline TbN'C2 samples in order to confirm the magnetic structure, especially the Tb moment direction in ThNiC2.
MAGMOM - VASP Wiki
For a magnetic calculation from scratch (ISTART =0), MAGMOM specifies (i) the initial on-site magnetic moment for each atom, and (ii) lowers the symmetry of the system (as of VASP.4.4.4). A magnetic calculation could be either a spin-polarized calculation (ISPIN =2) or noncollinear calculation (LNONCOLLINEAR =T).
Non-collinear DFT
The initial Euler angles, and , for orientation of the spin and orbital magnetic moment are given by the 8th and 9th columns, and 10th and 11th columns, respectively. The 12th column is a switch for a constraint scheme that a constraint (penalty or Zeeman) functional to the spin and orbital orientation is added on each site, where '1' means ...
Manipulating non-collinear antiferromagnetic order and thermal ...
Mar 1, 2024 · Magnetic materials with non-collinear spin orderings provide an outstanding platform to probe spintronic phenomena owing to their strong spin-orbit coupling (SOC) and unique Berry phase. It is thus important to obtain a non-collinear antiferromagnetic (AFM) phase at room temperature (RT).