On mechanisms of single-pulse echo formation in multidomain magnetic materials

Akhalkatsi, A. M.; Мамниашвили, Г. И.; Ben-Ezra, S

doi:10.1016/s0375-9601(01)00698-3

Cited by 11 publications

(14 citation statements)

References 4 publications

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“…This indicates that they have similar formation mechanisms. Since E 1 and E 2 are formed by the stimulated mechanism, 8,14,21 we conclude that C 2 is also caused by the stimulated mechanism.…”

Section: Resultsmentioning

confidence: 73%

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Multiple NMR spin echoes in magnets: The echo structure and potential applications

Akhalkatsi

Gavasheli

Gegechkori³

et al. 2009

Journal of Applied Physics

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Section: Resultsmentioning

confidence: 73%

“…In lithium ferrite the C 2 component changes with pulse duration like the E 1 and E 2 components formed by the stimulated mechanism. 21,22 The possibility of shortening 1 / T 2 of a single-pulse echo by the nonresonant mechanism was pointed first in Ref. 16.…”

Section: Discussionmentioning

confidence: 99%

Multiple NMR spin echoes in magnets: The echo structure and potential applications

Akhalkatsi

Gavasheli

Gegechkori³

et al. 2009

Journal of Applied Physics

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“…14 Note also that for the study of lithium ferrite we have upgraded a resonant spectrometer system similar to Ref. 15 that increased dramatically its sensitivity in comparison with Ref. 6.…”

Section: Experimental Technique and Samplesmentioning

confidence: 99%

Features of influence of dc magnetic field pulses on a nuclear spin echo in magnets

Мамниашвили¹,

Gegechkori²,

Akhalkatsi

et al. 2012

Low Temperature Physics

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Signal intensities of a two-pulse nuclear spin echo as a function of parameters of dc magnetic field pulses are measured in the series of materials: Li0.5Fe2.5–xZnxO4 (x < 0.25) (enriched in 57Fe isotope to 96.8%), NiMnSb, Co2MnSi, La1–хСахMnO3 (x = 0.2; 0.25) and polycrystalline Co. Two types of dependences of these signals on a supplying time of such pulses with respect to the times of the exciting RF pulses are found. The mechanisms of influence of a domain structure and a dynamic frequency shift on the observed features of the investigated signals are discussed.

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“…In the traditional Hahn mechanism of spin-echo formation for the observation of stimulated echo it is necessary to have at least three resonant RF pulses [1]. The possibility to observe the stimulated echo is related as it is known with fact that the z -component of magnetization of j -th isochromate after the termination of the second RF pulse depends on the phase of its transverse component at the start of the second pulse 12 τ ω ϕ…”

Section: Introductionmentioning

confidence: 99%

Two-pulse stimulated echo in magnets

Zviadadze

Мамниашвили

Gegechkori

et al. 2012

Phys. Metals Metallogr.

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The results of experimental study of two-pulse stimulated echo in ferromagnets of two types are presented. Ferromagnet Co and half-metal Co MnSi 2, in which a single-pulse echo formed by the distortion mechanism of the fronts of exciting pulse is also observed, are classified among the first type. Lithium ferrite and intermetal compound MnSb characterized by the absence of single-pulse echo in them - belong to the second type. For signals of two-pulse stimulated echo in the materials of the first type a short time and a long time of relaxations are observed. The short time is about the order of value shorter less than the spin-spin relaxation time. The long time is close to the transverse relaxation time of single-pulse echo formed by the distortion mechanism. The mechanisms that provide the possible interpretations of the peculiarities of the processes of nuclear magnetic relaxation are discussed.Comment: 10 pages, 7 figure

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On mechanisms of single-pulse echo formation in multidomain magnetic materials

Cited by 11 publications

References 4 publications

Multiple NMR spin echoes in magnets: The echo structure and potential applications

Multiple NMR spin echoes in magnets: The echo structure and potential applications

Features of influence of dc magnetic field pulses on a nuclear spin echo in magnets

Two-pulse stimulated echo in magnets

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