2020年10月1日
Capacitive detection of magnetostriction, dielectric constant, and magneto-caloric effects in pulsed magnetic fields
Review of Scientific Instruments
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- 巻
- 91
- 号
- 10
- 開始ページ
- 105103
- 終了ページ
- 105103
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1063/5.0010753
- 出版者・発行元
- AIP Publishing
© 2020 Author(s). We report on the development of a capacitance measuring system that allows measurements of capacitance in pulsed magnetic fields up to 61 T. By using this system, magnetic-field responses of various physical quantities, such as magnetostriction, magnetic-field-induced change in complex dielectric constant, and magneto-caloric effect, can be investigated in pulsed-magnetic-field conditions. Here, we examine the validity of our system for investigations of these magnetic-field-induced phenomena in pulse magnets. For the magnetostriction measurement, magnetostriction of a specimen can be measured through a change in the capacitance between two aligned electrodes glued on the specimen and a dilatometer. We demonstrate a precise detection of valley polarization in semimetallic bismuth through a magnetostriction signal with a resolution better than 10-6 of the relative length change. For the magnetic-field-induced change in complex dielectric constant, we successfully observed clear dielectric anomalies accompanied by magnetic/magnetoelectric phase transitions in multiferroic Pb(TiO)Cu4(PO4)4. For the measurement of magneto-caloric effect, a magnetic-field-induced change in sample temperature was verified for Gd3Ga5O12 with a capacitance thermometer made of a non-magnetic ferroelectric compound KTa1-xNbxO3 (x = 0.02) whose capacitance is nearly field-independent. These results show that our capacitance measuring system is a promising tool to study various magnetic-field-induced phenomena, which have been difficult to detect in pulsed magnetic fields.
- リンク情報
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- DOI
- https://doi.org/10.1063/5.0010753
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/33138569
- URL
- http://aip.scitation.org/doi/pdf/10.1063/5.0010753
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85092341146&origin=inward 本文へのリンクあり
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85092341146&origin=inward
- ID情報
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- DOI : 10.1063/5.0010753
- ISSN : 0034-6748
- eISSN : 1089-7623
- PubMed ID : 33138569
- SCOPUS ID : 85092341146