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Vagizov, F. G.; Manapov, R. A.; Sadykov, E. K.; Zakirov, L. L.

doi:10.1023/a:1012681513062

Cited by 10 publications

(2 citation statements)

References 8 publications

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“…Among many other promising applications of Mössbauer effect there are those, which provide information about dynamical processes induced in materials by radiofrequency (RF) magnetic field, ultrasound, and optical laser radiation . Since the discovery of the Mössbauer effect a number of interesting phenomena stimulated by external fields were observed: Ultrasonic and magnetostriction modulation of gamma‐radiation , RF collapse of the magnetic hyperfine structure , Rabi splitting of Mössbauer lines under NMR excitation , the effect of the rotating hyperfine magnetic field , gamma echo , etc. These phenomena noticeably enhance the efficiency of the Mössbauer effect as an experimental tool and allow getting information not attainable by conventional acquisition schemes.…”

Section: Introductionmentioning

confidence: 99%

Application of the Mössbauer effect to the study of opto‐acoustic phenomena

Vagizov

Shakhmuratov

Sadykov

2014

Physica Status Solidi (b)

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We present the results of the proof of principle experiment on the observation of the acoustic oscillations induced by the pulsed laser excitation. Time domain spectra agree well with the model of the frequency modulation of Mössbauer radiation passing through a vibrating resonance medium. The ratio of the fourth and second Fourier harmonics D 4V =D 2V of the modulated radiation is suggested to measure the modulation index since this ratio is very sensitive to the amplitude of nuclear vibrations. The proposed methodology may be used for the study of opto-acoustic phenomena. 1 Introduction Mössbauer spectroscopy is a unique technique for investigating structural and dynamical properties of solids on the atomic scale. This technique provides information about local symmetry, magnetic ordering, and chemical bonding in the immediate vicinity of the probing nucleus. Among many other promising applications of Mössbauer effect there are those, which provide information about dynamical processes induced in materials by radiofrequency (RF) magnetic field, ultrasound, and optical laser radiation [1]. Since the discovery of the Mössbauer effect a number of interesting phenomena stimulated by external fields were observed: Ultrasonic [2] and magnetostriction modulation of gamma-radiation [3][4][5], RF collapse of the magnetic hyperfine structure [6], Rabi splitting of Mössbauer lines under NMR excitation [7][8][9], the effect of the rotating hyperfine magnetic field [10], gamma echo [11], etc. These phenomena noticeably enhance the efficiency of the Mössbauer effect as an experimental tool and allow getting information not attainable by conventional acquisition schemes. For example, the modulation of Mössbauer spectra with ultrasound was efficiently used in studies of ultrasonic phenomena in solids [12]; RF collapse of the magnetic hyperfine structure was used in magnetic soft alloys for determination of the quadrupole splitting distribution [13]; Rabi splitting of Mössbauer lines were used to determine the amplitude of the RF field experienced by a nucleus and the hyperfine amplification factor [14].

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Section: Introductionmentioning

confidence: 99%

Application of the Mössbauer effect to the study of opto‐acoustic phenomena

Vagizov

Shakhmuratov

Sadykov

2014

Physica Status Solidi (b)

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“…Therefore, in this case a splitting of all spectral components is predicted. Attempts to observe the effect started in the 1960s [3], but they were ineffective for a long time, until recently, when the nuclear magnetic resonance at the excited 57 Fe nuclear level was observed by Kazan physicists (see [4] and references therein).…”

Section: Introductionmentioning

confidence: 99%

Relaxation-stimulated resonances in Mössbauer absorption spectra under radiofrequency magnetic field excitation

Afanas’ev

Чуев

Hesse

2000

J. Phys.: Condens. Matter

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A new type of resonant phenomena in the Mössbauer spectroscopy of soft magnetic materials in radiofrequency (rf) magnetic fields is predicted for the rf field frequencies related to those of components of the magnetic hyperfine structure via the parametric resonance condition. Resonant effects of this kind are still unknown in physics; they are realized not at frequencies of transitions between the energy sub-levels of the ground or excited nuclear states, which take place in conventional nuclear magnetic resonance, but at frequencies which are a combination of the frequencies of hyperfine transitions. In this case a separation between the real energy levels can exceed the value of the 'resonant' frequency by about 10 orders of magnitude and the resonant rf field sets as if in coherency between these energy levels. Such resonances can only be observed when relaxation processes play an essential role, which permits them to be defined as the relaxationstimulated resonances. The simplest relaxation model of so-called one-way and localized relaxation is proposed. Within this model an analytical expression for Mössbauer absorption spectra is derived, based on which the specific features of the new resonant effects are analysed in detail.

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