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Contactless measurement of nonlinear conductivity in the radio-frequency range (CROSBI ID 207161)

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Došlić, Marija ; Pelc, Damjan ; Požek, Miroslav Contactless measurement of nonlinear conductivity in the radio-frequency range // Review of scientific instruments, 85 (2014), 7; 073905-1-073905-6. doi: 10.1063/1.4890557

Podaci o odgovornosti

Došlić, Marija ; Pelc, Damjan ; Požek, Miroslav

engleski

Contactless measurement of nonlinear conductivity in the radio-frequency range

We have developed a system for contactless measurement of nonlinear conductivity in the radio-frequency band, and over a wide temperature range. Anon-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.

nonlinear conductivity ; contactless transport measurements ; strongly correlated electron systems

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Podaci o izdanju

85 (7)

2014.

073905-1-073905-6

objavljeno

0034-6748

10.1063/1.4890557

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Fizika

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