Apparatus for studying electro-physical properties of materials at low temperatures under external magnetic fields

• Published in: Functional Materials
• Date: 2014
• Main Authors: Bovda, O.M., Derevyanko, V.V., Sukhareva, T.V., Finkel, V.A.
• Format: Article
• Language: English
• Published: НТК «Інститут монокристалів» НАН України 2014
• Subjects: Devices and instruments
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/120450
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Apparatus for studying electro-physical properties of materials at low temperatures under external magnetic fields / O.M. Bovda, V.V. Derevyanko, T.V. Sukhareva, V.A. Finkel // Functional Materials. — 2014. — Т. 21, № 3. — С. 360-363. — Бібліогр.: 9 назв. — англ.

The object of the work is development and experimental realization of the apparatus for measuring electro-physical properties of materials at temperatures 15-273 K in external magnetic field Hext; in the apparatus, a gas heat engine (cryo-generator) has been used for obtaining low temperatures, and a system of permanent magnets has been applied for producing magnetic fields with magnetization force up to several kOe. Actually, the apparatus consists of two large blocks: a stationary setup for producing low temperatures using the cryo-generator (Leybold), and a detachable setup for creating magnetic fields using a system of permanent magnets pairs made from high-coercive Nd₂Fe₁₄B alloy. A system for collecting and treating the data obtained has been developed. For testing the apparatus, comparative measurements of electrical resistivity temperature dependence for MgB₂ superconductor have been carried out both in zero magnetic field and under Hext = 2 kOe.