{"title":"Magnetic damping in gadolinium","authors":"C. Burdett, R. B. Layng","doi":"10.1088/0508-3443/18/11/306","DOIUrl":null,"url":null,"abstract":"The variation of internal friction with strain amplitude at temperatures of 115, 168, 215, 245 and 298°K has been measured using a torsional pendulum at a frequency of 1 c/s. The damping with a magnetic origin has been separated from the total damping by a method due to Granato and Lucke, and the results have been explained in terms of the irreversible movement of 90° domain boundaries. A simple analysis using domain theory predicts a relation between the stress at peak damping and the magnetic field at maximum susceptibility. For gadolinium this field is 006 Oe at 245°K. A simple treatment of the variation of peak damping with temperature shows qualitative agreement with the results.","PeriodicalId":9350,"journal":{"name":"British Journal of Applied Physics","volume":"78 1","pages":"1551-1557"},"PeriodicalIF":0.0000,"publicationDate":"1967-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"British Journal of Applied Physics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1088/0508-3443/18/11/306","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 11
Abstract
The variation of internal friction with strain amplitude at temperatures of 115, 168, 215, 245 and 298°K has been measured using a torsional pendulum at a frequency of 1 c/s. The damping with a magnetic origin has been separated from the total damping by a method due to Granato and Lucke, and the results have been explained in terms of the irreversible movement of 90° domain boundaries. A simple analysis using domain theory predicts a relation between the stress at peak damping and the magnetic field at maximum susceptibility. For gadolinium this field is 006 Oe at 245°K. A simple treatment of the variation of peak damping with temperature shows qualitative agreement with the results.
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