Scanning SQUID-on-tip microscope in a top-loading cryogen-free dilution refrigerator.

Autor:	Zhou H; Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israel., Auerbach N; Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israel., Roy I; Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israel., Bocarsly M; Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israel., Huber ME; Departments of Physics and Electrical Engineering, University of Colorado Denver, Denver, Colorado 80204, USA., Barick B; Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israel., Pariari A; Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israel., Hücker M; Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israel., Lim ZS; Department of Physics, National University of Singapore, Singapore., Ariando A; Department of Physics, National University of Singapore, Singapore., Berdyugin AI; School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom.; National Graphene Institute, University of Manchester, Manchester M13 9PL, United Kingdom., Xin N; School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom.; National Graphene Institute, University of Manchester, Manchester M13 9PL, United Kingdom., Rappaport M; Department of Physics Core Facilities, Weizmann Institute of Science, Rehovot 7610001, Israel., Myasoedov Y; Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israel., Zeldov E; Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israel.
Jazyk:	angličtina
Zdroj:	The Review of scientific instruments [Rev Sci Instrum] 2023 May 01; Vol. 94 (5).
DOI:	10.1063/5.0142073
Abstrakt:	The scanning superconducting quantum interference device (SQUID) fabricated on the tip of a sharp quartz pipette (SQUID-on-tip) has emerged as a versatile tool for the nanoscale imaging of magnetic, thermal, and transport properties of microscopic devices of quantum materials. We present the design and performance of a scanning SQUID-on-tip microscope in a top-loading probe of a cryogen-free dilution refrigerator. The microscope is enclosed in a custom-made vacuum-tight cell mounted at the bottom of the probe and is suspended by springs to suppress vibrations caused by the pulse tube cryocooler. Two capillaries allow for the in situ control of helium exchange gas pressure in the cell that is required for thermal imaging. A nanoscale heater is used to create local temperature gradients in the sample, which enables quantitative characterization of relative vibrations between the tip and the sample. The spectrum of the vibrations shows distinct resonant peaks with a maximal power density of about 27 nm/Hz1/2 in the in-plane direction. The performance of the SQUID-on-tip microscope is demonstrated by magnetic imaging of the MnBi2Te4 magnetic topological insulator, magnetization and current distribution imaging in a SrRuO3 ferromagnetic oxide thin film, and thermal imaging of dissipation in graphene. (© 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu