A1 Journal article (refereed)
Thermoelectric Radiation Detector Based on Superconductor-Ferromagnet Systems (2018)

Heikkilä, T., Ojajärvi, R., Maasilta, I., Strambini, E., Giazotto, F., & Bergeret, F. S. (2018). Thermoelectric Radiation Detector Based on Superconductor-Ferromagnet Systems. Physical Review Applied, 10(3), Article 034053. https://doi.org/10.1103/PhysRevApplied.10.034053

JYU authors or editors

Publication details

All authors or editors: Heikkilä, Tero; Ojajärvi, Risto; Maasilta, Ilari; Strambini, E.; Giazotto, F.; Bergeret, F. S.

Journal or series: Physical Review Applied

ISSN: 2331-7019

eISSN: 2331-7019

Publication year: 2018

Volume: 10

Issue number: 3

Article number: 034053

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevApplied.10.034053

Publication open access: Other way freely accessible online

Publication channel open access:

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/59781

Web address where publication is available: https://arxiv.org/abs/1709.08856

Abstract

We suggest an ultrasensitive detector of electromagnetic fields exploiting the giant thermoelectric effect recently found in superconductor-ferromagnet hybrid structures. Compared with other types of superconducting detectors where the detected signal is based on variations of the detector impedance, the thermoelectric detector has the advantage of requiring no external driving fields. This is especially relevant in multipixel detectors, where the number of bias lines and the heating induced by them are an issue. We propose different material combinations to implement the detector and provide a detailed analysis of its sensitivity and speed. In particular, we perform a proper noise analysis that includes the cross correlation between heat and charge current noise and thereby describes also thermoelectric detectors with a large thermoelectric figure of merit.

Keywords: research equipment; detectors; cosmic background radiation; superconductors; optoelectronics; superconductivity

Free keywords: cosmic microwave background; cosmic ray and astroparticle detectors; thermoelectric effects; ferromagnetism

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Ministry reporting: Yes

Reporting Year: 2018

JUFO rating: 1