High-resolution thermal expansion measurements under helium-gas pressure

dc.contributor.authorManna, Rudra Sekhar
dc.contributor.authorWolf, Bernd
dc.contributor.authorDe Souza, Mariano [UNESP]
dc.contributor.authorLang, Michael
dc.contributor.institutionSFB/TR49
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:26:53Z
dc.date.available2014-05-27T11:26:53Z
dc.date.issued2012-08-01
dc.description.abstractWe report on the realization of a capacitive dilatometer, designed for high-resolution measurements of length changes of a material for temperatures 1.4K ≤ T ≤ 300K and hydrostatic pressure P ≤ 250MPa. Helium ( 4He) 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 ≃ 0.1MPa (ambient pressure) and 104MPa 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. © 2012 American Institute of Physics.en
dc.description.affiliationPhysics Institute Goethe University Frankfurt(M) SFB/TR49, D-60438 Frankfurt(M)
dc.description.affiliationDepartamento de Física Universidade Estadual Paulista, Rio Claro (SP)
dc.description.affiliationUnespDepartamento de Física Universidade Estadual Paulista, Rio Claro (SP)
dc.identifierhttp://dx.doi.org/10.1063/1.4747272
dc.identifier.citationReview of Scientific Instruments, v. 83, n. 8, 2012.
dc.identifier.doi10.1063/1.4747272
dc.identifier.file2-s2.0-84865752762.pdf
dc.identifier.issn0034-6748
dc.identifier.scopus2-s2.0-84865752762
dc.identifier.urihttp://hdl.handle.net/11449/73461
dc.language.isoeng
dc.relation.ispartofReview of Scientific Instruments
dc.relation.ispartofjcr1.428
dc.relation.ispartofsjr0,585
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectAmbient pressures
dc.subjectConstant-pressure conditions
dc.subjectEffect of pressure
dc.subjectHeisenberg antiferromagnets
dc.subjectHigh resolution
dc.subjectHigh-resolution measurements
dc.subjectMagnetic interactions
dc.subjectPressure transmitting mediums
dc.subjectQuasi-one-dimensional
dc.subjectThermal expansion measurements
dc.subjectHelium
dc.subjectHydrostatic pressure
dc.subjectDilatometers
dc.titleHigh-resolution thermal expansion measurements under helium-gas pressureen
dc.typeArtigo
dcterms.licensehttp://publishing.aip.org/authors/web-posting-guidelines
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Geociências e Ciências Exatas, Rio Claropt

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