A perpendicular field electromagnet with a 250 mm access bore

We present a laboratory electromagnet capable of generating magnetic fields up to ±0.48 T, specifically designed as a perpendicular flux source for thin film samples in an ambient environment. The magnet features a 250 mm diameter clear access bore above the sample plane, thus offering compatibility...

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Bibliographic Details
Published inReview of scientific instruments Vol. 92; no. 1; p. 015102
Main Authors Petrović, A P, Smit, B H M, Fong, K L, Satywali, B, Tee, X Y, Panagopoulos, C
Format Journal Article
LanguageEnglish
Published United States 01.01.2021
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Summary:We present a laboratory electromagnet capable of generating magnetic fields up to ±0.48 T, specifically designed as a perpendicular flux source for thin film samples in an ambient environment. The magnet features a 250 mm diameter clear access bore above the sample plane, thus offering compatibility with a wide variety of experimental apparatus. Despite its generous size, the magnet thermally dissipates less than 1 kW at maximum field. A shaped ferromagnetic core is used to amplify and homogenize the field B, leading to an estimated uniformity of ±1.5 mT (≲0.3%) in B within a 28 mm zone at maximum field. The sample stage is thermally regulated and isolated from the magnet, enabling temperature control with ±5 mK precision even at elevated magnetic fields.
ISSN:1089-7623
DOI:10.1063/5.0027913