Stimulated spin noise in an activated crystal

M.M. Sharipova, A.A. Kamenskii, I.I. Ryzhov, M.Yu. Petrov, G.G. Kozlov, A. Greilich, M. Bayer, V.S. Zapasskii

Research output

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Abstract

In the spin noise spectroscopy, the magnetic susceptibility spectrum is known to be provided by the spinsystem untouched by any external perturbation, or, better to say, disturbed only by its thermal bath. We propose a new version of the spin noise spectroscopy, with the detected magnetization (Faraday-rotation)
noise being stimulated by an external fluctuating magnetic field with a quasi-white spectrum. Experimental study of the stimulated spin noise performed on a BaF2 : U 3+ crystal in a longitudinal magnetic field has revealed specific features of this approach and allowed us to identify the Van-Vleck and population-related contributions to the AC susceptibility of the system and to discover unusual magnetic-field dependence of the longitudinal spin relaxation rate in low magnetic fields. It is shown that spectra of the stimulated and spontaneous spin noise, being both closely related to the spin-system magnetic susceptibility, are still essentially different. Distinctions between the two types of the spin-noise spectra and two approaches to the spin noise spectroscopy are discussed.
Original languageEnglish
Article number143901
Pages (from-to)143901
JournalJournal of Applied Physics
Volume126
Issue number14
Early online date8 Oct 2019
DOIs
Publication statusPublished - 8 Oct 2019

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crystals
magnetic permeability
magnetic fields
spectroscopy
noise spectra
Faraday effect
trucks
baths
alternating current
perturbation
magnetization

Cite this

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title = "Stimulated spin noise in an activated crystal",
abstract = "In the spin noise spectroscopy, the magnetic susceptibility spectrum is known to be provided by the spinsystem untouched by any external perturbation, or, better to say, disturbed only by its thermal bath. We propose a new version of the spin noise spectroscopy, with the detected magnetization (Faraday-rotation)noise being stimulated by an external fluctuating magnetic field with a quasi-white spectrum. Experimental study of the stimulated spin noise performed on a BaF2 : U 3+ crystal in a longitudinal magnetic field has revealed specific features of this approach and allowed us to identify the Van-Vleck and population-related contributions to the AC susceptibility of the system and to discover unusual magnetic-field dependence of the longitudinal spin relaxation rate in low magnetic fields. It is shown that spectra of the stimulated and spontaneous spin noise, being both closely related to the spin-system magnetic susceptibility, are still essentially different. Distinctions between the two types of the spin-noise spectra and two approaches to the spin noise spectroscopy are discussed.",
keywords = "Stochastic processes, Spin noise spectroscopy, Spectrum analyzers, Electronic noise, Electronic transport, Hyperfine structure, Nuclear magnetic resonance, Faraday effect, magnetic fields",
author = "M.M. Sharipova and A.A. Kamenskii and I.I. Ryzhov and M.Yu. Petrov and G.G. Kozlov and A. Greilich and M. Bayer and V.S. Zapasskii",
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language = "English",
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Stimulated spin noise in an activated crystal. / Sharipova, M.M. ; Kamenskii, A.A. ; Ryzhov, I.I.; Petrov, M.Yu.; Kozlov, G.G.; Greilich, A.; Bayer, M.; Zapasskii, V.S.

In: Journal of Applied Physics, Vol. 126, No. 14, 143901, 08.10.2019, p. 143901.

Research output

TY - JOUR

T1 - Stimulated spin noise in an activated crystal

AU - Sharipova, M.M.

AU - Kamenskii, A.A.

AU - Ryzhov, I.I.

AU - Petrov, M.Yu.

AU - Kozlov, G.G.

AU - Greilich, A.

AU - Bayer, M.

AU - Zapasskii, V.S.

PY - 2019/10/8

Y1 - 2019/10/8

N2 - In the spin noise spectroscopy, the magnetic susceptibility spectrum is known to be provided by the spinsystem untouched by any external perturbation, or, better to say, disturbed only by its thermal bath. We propose a new version of the spin noise spectroscopy, with the detected magnetization (Faraday-rotation)noise being stimulated by an external fluctuating magnetic field with a quasi-white spectrum. Experimental study of the stimulated spin noise performed on a BaF2 : U 3+ crystal in a longitudinal magnetic field has revealed specific features of this approach and allowed us to identify the Van-Vleck and population-related contributions to the AC susceptibility of the system and to discover unusual magnetic-field dependence of the longitudinal spin relaxation rate in low magnetic fields. It is shown that spectra of the stimulated and spontaneous spin noise, being both closely related to the spin-system magnetic susceptibility, are still essentially different. Distinctions between the two types of the spin-noise spectra and two approaches to the spin noise spectroscopy are discussed.

AB - In the spin noise spectroscopy, the magnetic susceptibility spectrum is known to be provided by the spinsystem untouched by any external perturbation, or, better to say, disturbed only by its thermal bath. We propose a new version of the spin noise spectroscopy, with the detected magnetization (Faraday-rotation)noise being stimulated by an external fluctuating magnetic field with a quasi-white spectrum. Experimental study of the stimulated spin noise performed on a BaF2 : U 3+ crystal in a longitudinal magnetic field has revealed specific features of this approach and allowed us to identify the Van-Vleck and population-related contributions to the AC susceptibility of the system and to discover unusual magnetic-field dependence of the longitudinal spin relaxation rate in low magnetic fields. It is shown that spectra of the stimulated and spontaneous spin noise, being both closely related to the spin-system magnetic susceptibility, are still essentially different. Distinctions between the two types of the spin-noise spectra and two approaches to the spin noise spectroscopy are discussed.

KW - Stochastic processes

KW - Spin noise spectroscopy

KW - Spectrum analyzers

KW - Electronic noise

KW - Electronic transport

KW - Hyperfine structure

KW - Nuclear magnetic resonance

KW - Faraday effect

KW - magnetic fields

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