| High-resolution thermal expansion measurements under helium-gas pressure. | |
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MedLine Citation:
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PMID: 22938336 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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We report on the realization of a capacitive dilatometer, designed for high-resolution measurements of length changes of a material for temperatures 1.4 K ≤ T ≤ 300 K and hydrostatic pressure P ≤ 250 MPa. Helium ((4)He) is used as a pressure-transmitting medium, ensuring hydrostatic-pressure conditions. Special emphasis has been given to guarantee, to a good approximation, constant-pressure conditions during temperature sweeps. The performance of the dilatometer is demonstrated by measurements of the coefficient of thermal expansion at pressures P ≃ 0.1 MPa (ambient pressure) and 104 MPa on a single crystal of azurite, Cu(3)(CO(3))(2)(OH)(2), a quasi-one-dimensional spin S = 1/2 Heisenberg antiferromagnet. The results indicate a strong effect of pressure on the magnetic interactions in this system. |
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Authors:
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Rudra Sekhar Manna; Bernd Wolf; Mariano de Souza; Michael Lang |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Review of scientific instruments Volume: 83 ISSN: 1089-7623 ISO Abbreviation: Rev Sci Instrum Publication Date: 2012 Aug |
Date Detail:
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Created Date: 2012-09-03 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0405571 Medline TA: Rev Sci Instrum Country: United States |
Other Details:
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Languages: eng Pagination: 085111 Citation Subset: IM |
Affiliation:
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Physics Institute, Goethe University Frankfurt(M), SFB/TR49, D-60438 Frankfurt(M), Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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