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Development of Metallic Magnetic Calorimeters with a Critical Temperature Switch

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Title
Development of Metallic Magnetic Calorimeters with a Critical Temperature Switch
Author(s)
Kim, So Ra; Choi, Jun Seok; Jo, Hyonsuk; Kang, Chan Seok; Kim, Geon Bo; Hyelim Kim; In Wook Kim; Hye Jin Lee; J.H. Lee; Lee, MK; Seung Yoon Oh; Sala, Elena; So, JungHo; W.S. Yoon; Kim, Yong Hamb
Publication Date
2016-07
Journal
JOURNAL OF LOW TEMPERATURE PHYSICS, v.184, no.1-2, pp.356 - 362
Publisher
SPRINGER/PLENUM PUBLISHERS
Abstract
We report on the progress in the development of meander-shaped metallic magnetic calorimeters (MMCs) with a critical temperature switch. A niobium meander-shaped coil in an MMC is arranged to form a superconducting loop. It is to measure the change in magnetization and to apply a persistent current that magnetizes the MMC sensor material. In this work, part of the superconducting loop is fabricated with another superconducting material with its transition temperature () lower than that of niobium. A persistent current can be injected in the loop while reducing the temperature from above to below the of the switch. Aluminum (Al) wires and an alloy of molybdenum and germanium (MoGe) were tested as critical temperature switch. The test with the Al switch demonstrated the temperature switch concept for meander-shaped MMCs that require a large field current. Microfabricated MoGe switches showed a near 4.3 K, but only 7 mA of persistent current could be charged due to MoGe film discontinuity. This issue requires further improvement in the fabrication procedure. © Springer Science+Business Media New York 2016
URI
https://pr.ibs.re.kr/handle/8788114/4838
ISSN
0022-2291
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
Files in This Item:
10.1007%2Fs10909-016-1479-y.pdfDownload

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