2002
DOI: 10.1088/0953-8984/14/45/310
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Incommensurate phases in the improper ferroelastic MgGeF6  6H2O:Mnstudied by means of EPR

Abstract: The results of an EPR study of the inhomogeneous phases existing in the temperature interval TC = 311.0 ± 0.3 K < T < Ti1 = 403 ± 0.3 K in improper ferroelastic crystals of MgGeF6 · 6H2O:Mn2+ are presented. On the basis of the analysis of the temperature and angle dependences of the experimental parameters and numerical calculations, the conclusion has been drawn that at Ti1 the crystals considered undergo a transition to a structurally modulated phase and the order parameter of this transition may be the … Show more

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Cited by 3 publications
(5 citation statements)
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“…The obtained experimental data on birefringent and piezooptic properties of MGFH correlate well with the results of Ref. [3].…”
Section: Discussionsupporting
confidence: 88%
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“…The obtained experimental data on birefringent and piezooptic properties of MGFH correlate well with the results of Ref. [3].…”
Section: Discussionsupporting
confidence: 88%
“…The set of the observed effects indicates the IC structure existence [6]. Comparing the obtained data with the results of [3] one can conclude that below T < 380 K the soliton regime of modulated structure exists.…”
Section: Resultssupporting
confidence: 60%
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“…Various simulated EPR line shapes are described in the plane wave and soliton regimes [12][13][14][15][16]. A model in which both linear and quadratic local line shifts are included [16], the broad soliton model [14] and incommensurate modulation with variation of the spin-lattice relaxation rate over the spectrum [15] lead to very asymmetrical singularities.…”
Section: Incommensurate Phasementioning
confidence: 99%
“…For example, asymmetrical EPR lines with two edge singularities observed in MgSiF 6 •H 2 O:Mn 2+ have been explained in terms of the existence of broad antiphase domain walls [17]. However, in a similar crystal, MgGeF 6 •H 2 O:Mn 2+ , this model was not as successful in fitting the EPR line shapes as when using the modulated crystal structure [15].…”
Section: Incommensurate Phasementioning
confidence: 99%