Kombinatorik

Wenzel, Horst; Heinrich, Gottfried

doi:10.1007/978-3-322-94555-6_4

Cited by 1 publication

(2 citation statements)

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Section: Low Power Measurement Proceduresmentioning

confidence: 99%

“…It is locked to the TTL output of the source, passing through a custom frequency multiplier. The scheme of the frequency multiplier is similar to the one proposed by Wenzel, 6 and the values of the components needed for the required frequency range determined by simulation in the free software TINA. 7 A high pass filter could be used instead of the multiplier, but in our experience this leads to higher phase noise and lower locking quality.…”

Section: Low Power Measurement Proceduresmentioning

confidence: 99%

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Contactless measurement of nonlinear conductivity in the radio-frequency range

Došlić¹,

Pelc²,

Požek³

2014

Review of Scientific Instruments

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We have developed a system for contactless measurement of nonlinear conductivity in the radio-frequency band, and over a wide temperature range. A non-resonant circuit is used to electrically excite the sample, and the induced signal is detected by a resonant circuit whose natural frequency matches higher harmonics of the excitation. A simple modification of the probe allows non-resonant detection suitable for stronger signals. Two measurement procedures are proposed that allow significant excitation power variation, up to 150 W. The apparatus has been validated trough the measurement of the nonlinear response at the superconducting transition of a high-Tc superconductor, and the nematic transition of an iron pnictide.

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Section: Low Power Measurement Proceduresmentioning

confidence: 99%

Section: Low Power Measurement Proceduresmentioning

confidence: 99%