Resonant dislocation motion in NaCl crystals in the EPR scheme in the Earth's magnetic field with pulsed pumping

V.I. Alshits, E.V. Darinskaya, V.A. Morozov, V.M. Kats, A.A. Lukin

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Abstract

Resonant dislocation motions in NaCl(Ca) crystals under the simultaneous action of the Earth's magnetic field BEarth (∼66 μT) and a pulsed pump field B of sufficient amplitude Bm and certain duration τ have been detected and studied. The measured dislocation path peaks l(τ) have a maximum at τ = τr ≈ 0.53 μs. The resonance criterion has been found to be the ordinary EPR condition in which the g-factor is close to 2 and the optimum inverse pulse duration τr -1 is used instead of the harmonic pump field frequency νr. The largest peak l(τ) height is reached at mutually orthogonal dislocation (L) and magnetic field (BEarth and B) orientations. Pulsed field rotation to the position B {norm of matrix} BEarth significantly decreases but does not "kill" the effect. For dislocations parallel to the Earth's field (L {norm of matrix} BEarth), the resonance almost disappears even at B ⊥ BEarth. In the optimum geometry of experiments, as the pump field amplitude Bm decreases from 17.6 to 10 μT, the path peak height lr = l
Original languageEnglish
Pages (from-to)2289-2296
JournalPhysics of the Solid State
Issue number11
DOIs
StatePublished - 2013

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