منابع مشابه
Excitation of coherent propagating spin waves by pure spin currents.
Utilization of pure spin currents not accompanied by the flow of electrical charge provides unprecedented opportunities for the emerging technologies based on the electron's spin degree of freedom, such as spintronics and magnonics. It was recently shown that pure spin currents can be used to excite coherent magnetization dynamics in magnetic nanostructures. However, because of the intrinsic no...
متن کاملAll-optical probe of coherent spin waves.
A novel, all-optical method to excite and detect spin waves in magnetic materials is presented. By exploiting the temperature dependence of the magnetic anisotropy, an ultrashort laser pulse is efficiently converted in a picosecond "anisotropy field" pulse that triggers a coherent precession of the magnetization. Recording the temporal evolution of the precessing spins by a time-delayed probe-p...
متن کاملCoherent terahertz control of antiferromagnetic spin waves
Ultrafast charge and spin excitations in the elusive terahertz regime1,2 of the electromagnetic spectrum playa pivotal role in condensed matter3-13• The electric field of free-space terahertz pulses has provided a direct gateway to manipulating the motion of charges on the femtosecond timescale6-9 • Here, we complement this process by showing that the magnetic component of intense terahertz tra...
متن کاملUltrafast laser excitation of coherent spin waves in exchange-biased IrMn/Co
We have excited and detected coherent spin waves in exchange-biased IrMn/Co systems by ultrafast laser pump-probe magneto-optical Kerr effect (MOKE). Such ultrafast measurements provide opportunity to study the ultimate time scale for these processes as well as determination of fundamental parameters such as anisotropy and damping. This is in analogy with ferromagnetic resonance (FMR), but with...
متن کاملAn Entanglement Study of Superposition of Qutrit Spin-Coherent States
Considering generalized concurrence as the criterion of entanglement, we study entanglement properties of superposition of two qutrit coherent states, as a function of their amplitudes. These states may attain maximum entanglement or no entanglement at all, depending on the choice of the parameters involved. The states revealing maximum entanglement also display the maximum violations of the Be...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2015
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.91.104409