The measurement of magnetocrystalline anisotropy in pulsed magnetic fields
The measurement of magnetocrystalline anisotropy in pulsed magnetic fields
The first part of this thesis discusses the problems associated with pulsed magnetic field production. Particular attention is paid to the analysis of the stress components in a high field solenoid and measurements of two of the three principle stress components are described. The use of a composite copper/steel conductor, as a possible winding material for a high field solenoid is considered. The second part of this thesis describes the design, construction,and operation of apparatus enabling' anisotropy measurements to be carried out in pulsed magnetic fields up to 15T. The measurements are possible over a temperature range 4.2 K - 300K. Magnetic Anisotropy measurements on hexagonal Cobalt and Single Crystal Dysprosium are reported. The measurements on Cobalt were performed in the temperature range 4.2K to 300K and in applied fiel66 up to 5T. The first and second order anisotropy constants K1 and K2 have been determined as a function of temperature and applied field. The results are compared with other published data on the anisotropy of Cobalt.The measurements on Dysprosium were performed in the temperature range 4.2K to 120K and in. applied fields up to 15T. The basal plane anisotropy constant K4 was determined as a function of temperature and applied field. The observed field depth-dente of K4 was compared with recent theoretical predictions.
University of Southampton
1975
Rayner, David Leonard
(1975)
The measurement of magnetocrystalline anisotropy in pulsed magnetic fields.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
The first part of this thesis discusses the problems associated with pulsed magnetic field production. Particular attention is paid to the analysis of the stress components in a high field solenoid and measurements of two of the three principle stress components are described. The use of a composite copper/steel conductor, as a possible winding material for a high field solenoid is considered. The second part of this thesis describes the design, construction,and operation of apparatus enabling' anisotropy measurements to be carried out in pulsed magnetic fields up to 15T. The measurements are possible over a temperature range 4.2 K - 300K. Magnetic Anisotropy measurements on hexagonal Cobalt and Single Crystal Dysprosium are reported. The measurements on Cobalt were performed in the temperature range 4.2K to 300K and in applied fiel66 up to 5T. The first and second order anisotropy constants K1 and K2 have been determined as a function of temperature and applied field. The results are compared with other published data on the anisotropy of Cobalt.The measurements on Dysprosium were performed in the temperature range 4.2K to 120K and in. applied fields up to 15T. The basal plane anisotropy constant K4 was determined as a function of temperature and applied field. The observed field depth-dente of K4 was compared with recent theoretical predictions.
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Published date: 1975
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Local EPrints ID: 462677
URI: http://eprints.soton.ac.uk/id/eprint/462677
PURE UUID: 8f92b638-218f-458d-8cd1-40e27f72e978
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Date deposited: 04 Jul 2022 19:40
Last modified: 04 Jul 2022 19:40
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Author:
David Leonard Rayner
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