{"title":"Measuring Magnetization Curves of Ferrofluids: Comparison of the Differential Sweep Method and a Vibrating-Sample Magnetometer","authors":"A. V. Lebedev","doi":"10.1134/S0020441224701574","DOIUrl":null,"url":null,"abstract":"<p>A setup design is proposed for measuring magnetization curves by the differential sweep method. On the described setup, a number of magnetization curves were measured for both classical magnetic fluids and samples obtained by their solidification. The measurement results are compared with the results obtained using a vibrating-sample magnetometer. It is shown that the vibrating-sample magnetometer gives significantly lower values compared to the differential method when measuring the magnetization of a magnetic fluid. When measuring the magnetization of a cured magnetic-fluid sample, a complete coincidence of the results obtained by both measurement methods is observed. The discovered phenomenon is explained by the aggregation of particles in the magnetic fluid under the influence of a magnetic field. Estimations of the relative delay in the movement of aggregates are consistent with the observed divergence in the magnetization magnitude.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"67 5","pages":"989 - 994"},"PeriodicalIF":0.4000,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Instruments and Experimental Techniques","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S0020441224701574","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
A setup design is proposed for measuring magnetization curves by the differential sweep method. On the described setup, a number of magnetization curves were measured for both classical magnetic fluids and samples obtained by their solidification. The measurement results are compared with the results obtained using a vibrating-sample magnetometer. It is shown that the vibrating-sample magnetometer gives significantly lower values compared to the differential method when measuring the magnetization of a magnetic fluid. When measuring the magnetization of a cured magnetic-fluid sample, a complete coincidence of the results obtained by both measurement methods is observed. The discovered phenomenon is explained by the aggregation of particles in the magnetic fluid under the influence of a magnetic field. Estimations of the relative delay in the movement of aggregates are consistent with the observed divergence in the magnetization magnitude.
期刊介绍：
Instruments and Experimental Techniques is an international peer reviewed journal that publishes reviews describing advanced methods for physical measurements and techniques and original articles that present techniques for physical measurements, principles of operation, design, methods of application, and analysis of the operation of physical instruments used in all fields of experimental physics and when conducting measurements using physical methods and instruments in astronomy, natural sciences, chemistry, biology, medicine, and ecology.
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