spin wave sentence in Hindi
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- His measurements of the spin waves in rare-earth metals marked a significant advance in the study of magnetism, for which he was awarded ( jointly with Hans Bjerrum M�ller ) the prestigious Spedding Prize in 1986.
- For the first time Kirschner's group in Max-Planck institute of Microstructure Physics showed that the signature of the large wave vector spin waves can be detected by spin polarized electron energy loss spectroscopy ( SPEELS ).
- His influence on the development of solid state physics extends to a deep understanding of many facets such as surface physics, of thermionic emission, of transport phenomena in semiconductors and of collective excitations in solids such as spin waves.
- In the case of coupled spin structures, the technique provides information not only about the energies spin excitations, but also about their spread across the structure, making it possible to image the spin wave modes in nanoengineered spin chains.
- From this explanation one can see why the Ising model magnet with discrete symmetry has no spin waves : the notion of spreading a disturbance in the spin lattice over a long wavelength makes no sense when spins have only two possible orientations.
- The combined effect of the two operators is therefore to propagate the rotated spin to a new position, which is a hint that the correct eigenstate is a "'spin wave "', namely a superposition of states with one reduced spin.
- Those spin waves were obtained up to the surface Brillouin zone ( SBZ ) at the energy range about few hundreds of meV . Another recent example is the investigation of 1 and 2 monolayer Fe films grown on W ( 110 ) measured at 120 K and 300 K, respectively.
- Particular discoveries include the antiferromagnetic ordering in solid helium-3, nuclear spin waves in spin polarized atomic hydrogen gas with Jack H . Freed, and the tri-critical point on the phase separation curve of liquid 4 He-3 He, in collaboration with his Cornell colleague John Reppy.
- For example, a magnon in a ferromagnet can be considered in one of two perfectly equivalent ways : ( a ) as a mobile defect ( a misdirected spin ) in a perfect alignment of magnetic moments or ( b ) as a quantum of a collective spin wave that involves the precession of many spins.
- The cross-products in this forbidding-looking equation show that the propagation of spin waves is governed by the torques generated by internal and external fields . ( An equivalent form is the Landau-Lifshitz-Gilbert equation, which replaces the final term by a more " simply looking " equivalent one .)
- A second example shows the possibility for the direct control of spin waves with THz radiation on antiferromagnetic NiO . These are promising demonstrations of how the switching of electric and magnetic properties in multiferroics, mediated by the mixed character of the magnetoelectric dynamics, may lead to ultrafast data processing, communication and quantum computing devices.
- Anderson localization is a general wave phenomenon that applies to the transport of electromagnetic waves, acoustic waves, quantum waves, spin waves, etc . This phenomenon is to be distinguished from weak localization, which is the precursor effect of Anderson localization ( see below ), and from Mott localization, named after Sir Nevill Mott, where the transition from metallic to insulating behaviour is " not " due to disorder, but to a strong mutual Coulomb repulsion of electrons.
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