Spin-injection terahertz radiation in magnetic junctions

Gulyaev, Yu. V.; Zilberman, P. E.; Malikov, I. V.; Михайлов, Г. М.; Panas, A. I.; Chigarev, S. G.; Épshteǐn, É. M.

doi:10.1134/s0021364011050055

Cited by 40 publications

(26 citation statements)

References 2 publications

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“…In particular, the terahertz emission in the structure that consists of a magnetic conducting sharpened steel rod and a con tacting metal magnetic film deposited on a dielectric substrate is studied in [8][9][10][11]. A method for the cre ation of the nonequilibrium population is theoretically analyzed in [2][3][4]6], where the planar structures that consist of two ferromagnetic films are investigated in the presence of the current flow that is perpendicular to the film plane.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, we study the effect related to the for mation of the nonequilibrium population (up to pop ulation inversion) of the spin energy subbands [3,6]. It is expedient to analyze the effect, since the splitting energy of the spin subbands is relatively small and the radiation frequency can be in the far IR (including terahertz) range (1)(2)(3)(4)(5)(6)(7)(8)(9)(10). It is known that the above spectral range is poorly mastered in spite of sig nificant practical interest [7].…”

Section: Introductionmentioning

confidence: 99%

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Observation of the spin-injection terahertz emission in planar ferromagnetic two-layer structures

Gulyaev

Zilberman

Malikov

et al. 2012

J. Commun. Technol. Electron.

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The spin injection emission of the system that consists of a nonmagnetic conducting rod and two layer planar heteroepitaxial structure formed by thin metal and magnetite films is experimentally studied. The electromagnetic emission in the terahertz range is demonstrated for the first time due to the creation of the nonequilibrium population of the spin energy subbands (relatively low current densities of about 10 5 A/cm 2 are needed at room temperature).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Observation of the spin-injection terahertz emission in planar ferromagnetic two-layer structures

Gulyaev

Zilberman

Malikov

et al. 2012

J. Commun. Technol. Electron.

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“…One of the promising directions is the use of spin injection in magnetic transitions [4][5][6][7] that results in the inverse population of spin energy subbands. Experimental results confirming the possibility of generating tera hertz radiation with the use of magnetic transitions were obtained [8,9]. These data stimulate interest in systems resonant in the terahertz range that can be used as receivers of terahertz radiation.…”

Section: Introductionmentioning

confidence: 51%

sd-Exchange electron spin resonance in a ferromagnetic metal

et al. 2014

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The possibility of resonance absorption in the terahertz range caused by the sd exchange interaction at the incidence of an electromagnetic wave on a ferromagnetic metal has been predicted. The absorption coeffi cient has been calculated. It has been shown that the resonance frequency is determined by the magnetization of a ferromagnet and the absorption coefficient additionally depends on the orientation of the magnetization with respect to the plane of polarization of the wave.

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“…This effect has been observed experimentally [11]. Recently, photon emission from ferromagnetic metal junctions was also observed [22,23].…”

Section: "Exchange-orbital" Interaction Between Free Electron Spin Anmentioning

confidence: 58%

Photon generation in ferromagnetic point contacts

Kadigrobov

Shekhter

Jonson

2012

Low Temperature Physics

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We show theoretically that a significant spin accumulation can occur in electric point contacts between two ferromagnetic electrodes with different magnetizations. Under appropriate conditions an inverse population of spin-split electronic levels results in stimulated emission of photons in the presence of a resonant electromagnetic field. The intensity of the emitted radiation can be several orders of magnitude higher than in typical semiconductor laser materials for two reasons.(1) The density of conduction electrons in a metal point conduct is much larger than in semiconductors. (2) The strength of the coupling between the electron spins and the electromagnetic field that is responsible for the radiative spin-flip transitions is set by the magnetic exchange energy and can therefore be very large as suggested by Kadigrobov et al. [Europhys. Lett. 67, 948 (2004)

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Spin-injection terahertz radiation in magnetic junctions

Cited by 40 publications

References 2 publications

Observation of the spin-injection terahertz emission in planar ferromagnetic two-layer structures

Observation of the spin-injection terahertz emission in planar ferromagnetic two-layer structures

sd-Exchange electron spin resonance in a ferromagnetic metal

Photon generation in ferromagnetic point contacts

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