Spin dynamics and spin-polarized EELS spectra of model itinerant-electron magnetic films

1995 ◽  
Vol 52 (17) ◽  
pp. 12813-12828 ◽  
Author(s):  
M. Plihal ◽  
D. L. Mills
Keyword(s):  
Spin Dynamics ◽  
Magnetic Films ◽  
Itinerant Electron ◽  
Spin Polarized

Simulations of Non-linear Spin Dynamics in Spin Polarized Dilute 3He–4He Mixtures

2012 ◽  
Vol 171 (3-4) ◽  
pp. 165-170 ◽  
Author(s):  
Dean L. Hawthorne ◽  
Scott Wilde ◽  
D. M. Lee
Keyword(s):  
Spin Dynamics ◽  
Spin Polarized ◽  
Non Linear

Transverse spin dynamics in spin-polarized Fermi liquids

1992 ◽  
Vol 89 (3-4) ◽  
pp. 531-534
Author(s):  
A. E. Meyerovich ◽  
K. A. Musaelian
Keyword(s):  
Spin Dynamics ◽  
Transverse Spin ◽  
Fermi Liquids ◽  
Spin Polarized

Neutron Studies of the Iron-based Family of High Tc Magnetic Superconductors

2008 ◽  
Vol 1148 ◽  
Author(s):  
Jeffrey W. Lynn
Keyword(s):  
Magnetic Order ◽  
Spin Dynamics ◽  
Magnetic Scattering ◽  
Anisotropic Pressure ◽  
Itinerant Electron ◽  
Superconducting Transition ◽  
Orthogonal Direction ◽  
Magnetic Structures ◽  
Se Doping ◽  
Iron Based

AbstractWe briefly review recent neutron scattering investigations carried out at the NIST Center for Neutron Research on the crystal structures, magnetic structures, and spin dynamics of the iron-based ROFe(As,P) (R=La, Ce, Pr, Nd), and (Ba,Sr,Ca)Fe2As2 systems. All the undoped materials exhibit universal behavior, where a tetragonal-to-orthorhombic structural transition occurs between ˜100−220 K, below which the systems become antiferromagnets. The magnetic structure within the a-b plane consists of chains of parallel Fe spins that are coupled antiferromagnetically in the orthogonal direction, with an ordered moment typically less than one Bohr magneton. Hence these are itinerant electron magnets, with a spin structure that is consistent with Fermi-surface nesting and a spin wave bandwidth ˜200 meV. The rare-earth moments order antiferromagnetically at low T like ‘conventional’ magnetic-superconductors. With doping, the structural and magnetic transitions are suppressed in favor of superconductivity, with superconducting transition temperatures up to 56 K, while the Ce crystal field linewidths are affected when superconductivity sets in. The application of pressure in CaFe2As2 transforms the system from a magnetically ordered orthorhombic material to a ‘collapsed’ non-magnetic tetragonal system which is superconducting at lower T when anisotropic pressure is applied. Fe1+xTe shows a transition from a monoclinic to orthorhombic low T structure with increasing x, and a crossover from commensurate to incommensurate magnetic order. Se doping suppresses the magnetic order, while incommensurate magnetic scattering is observed in the superconducting regime.

Observation of Néel structure walls on the surface of 1.4‐μm‐thick magnetic films using spin‐polarized scanning electron microscopy

1986 ◽  
Vol 49 (15) ◽  
pp. 980-981 ◽  
Author(s):  
K. Koike ◽  
H. Matsuyama ◽  
K. Hayakawa ◽  
K. Mitsuoka ◽  
S. Narishige ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Magnetic Films ◽  
Spin Polarized ◽  
Scanning Electron
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