Conductive Domain-Wall Temperature Sensors of LiNbO3 Ferroelectric Single-Crystal Thin FilmsShow others and affiliations
2021 (English)In: IEEE Electron Device Letters, ISSN 0741-3106, E-ISSN 1558-0563, Vol. 42, no 12, p. 1841-1844Article in journal (Refereed) Published
Abstract [en]
Domain wall current (DWC) plays a key role in storage devices, logic devices and sensors due to its high on-off ratio and nano structure size in the era of nanoelectronics technology. In this work, the DWC of single crystal LiNbO3 thin film was studied by piezoresponse force microscope (PFM) and conducting atomic force microscope (c-AFM). We mainly focus on voltage and temperature dependence of DWC which increases with the voltage and temperatures. Based on this research, the packaged DWC temperature sensor is fabricated and applied in wide temperature range. The existence of domain walls makes the current on-off ratio as high as 103 at the voltage of 15 V. Our study shows that DWC has a negative temperature coefficient (NTC) from 140 K to 500 K. The current increases from 3 pA to 57 μA, which is attributed to the conductivity of switched domain. This work proposes a new type temperature sensor with wide temperature range and high compatibility and sensitivity. In addition, it provides support for harsh environment applications of ferroelectric domain engineering devices.
Place, publisher, year, edition, pages
IEEE, 2021. Vol. 42, no 12, p. 1841-1844
Keywords [en]
Domain Wall Current, LiNbO3, Ferroelectric, Single Crystal Thin Film
National Category
Atom and Molecular Physics and Optics
Research subject
Applied Physics
Identifiers
URN: urn:nbn:se:ltu:diva-87416DOI: 10.1109/LED.2021.3118384ISI: 000722001400040Scopus ID: 2-s2.0-85119605419OAI: oai:DiVA.org:ltu-87416DiVA, id: diva2:1601136
Note
Validerad;2021;Nivå 2;2021-11-30 (johcin);
Funder: National Key R&D Program of China (2019YFF0301802, 2019YFB2004802, 2018YFF0300605); National Natural Science Foundation of China (62171415, 51975541); Key R&D Projects of Shanxi Province (20201101015)
2021-10-072021-10-072021-12-13Bibliographically approved