Vortex states near absolute zero in a weak-pinning amorphous MoxGe1−xfilm probed by pulsed mode-locking resonance

Sohara, Naoya; Ochi, Aguri; Murakami, E.; Ienaga, Koichiro; Kaneko, Shigeo; Kokubo, N.; Okuma, S.

doi:10.1088/1742-6596/871/1/012022

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“…In the latter mode, the voltage induced by vortex motion was measured using an oscilloscope (Rohde and Schwarz RTO2024) with resolution of 10 MHz [22,23]. The pulsed current technique was used successfully for the mode-locking resonance at 0.05 K to detect the moving vortex lattice [24,25].…”

Section: Methodsmentioning

confidence: 99%

Dc vortex-flow resistivity in an epitaxially grown MgB₂ film probed by pulsed current measurements

Ueno

Ienaga²,

Maegochi³

et al. 2022

J. Phys.: Conf. Ser.

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Using pulsed currents, we measure the dc vortex-flow resistivity ρf in a fast-flow regime for an epitaxially grown MgB2 film. In the vortex-solid phase the current-voltage (I-V) characteristics in different magnetic fields B exhibit a crossover from nonlinear to linear behavior with an increase in I, indicating a change from pinning-dominated to viscous-force dominated flow. ρf (B) extracted from the slope of the linear part of the I − V data shows an unusual field dependence with strong enhancement at low B similar to that reported from microwave surface impedance. The results suggest that two-band properties can be also detected by dc measurements with pulsed currents in MgB2 films.

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Section: Methodsmentioning

confidence: 99%

Dc vortex-flow resistivity in an epitaxially grown MgB₂ film probed by pulsed current measurements

Ueno

Ienaga²,

Maegochi³

et al. 2022

J. Phys.: Conf. Ser.

Self Cite

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Vortex states near absolute zero in a weak-pinning amorphous Mo_xGe_1−xfilm probed by pulsed mode-locking resonance

Cited by 1 publication

References 43 publications

Dc vortex-flow resistivity in an epitaxially grown MgB₂ film probed by pulsed current measurements

Dc vortex-flow resistivity in an epitaxially grown MgB₂ film probed by pulsed current measurements

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Vortex states near absolute zero in a weak-pinning amorphous MoxGe1−xfilm probed by pulsed mode-locking resonance

Cited by 1 publication

References 43 publications

Dc vortex-flow resistivity in an epitaxially grown MgB2 film probed by pulsed current measurements

Dc vortex-flow resistivity in an epitaxially grown MgB2 film probed by pulsed current measurements

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Vortex states near absolute zero in a weak-pinning amorphous Mo_xGe_1−xfilm probed by pulsed mode-locking resonance

Dc vortex-flow resistivity in an epitaxially grown MgB₂ film probed by pulsed current measurements

Dc vortex-flow resistivity in an epitaxially grown MgB₂ film probed by pulsed current measurements