High-resolution thermal expansion measurements under helium-gas pressure

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorManna, Rudra Sekhar
dc.creatorWolf, Bernd
dc.creatorDe Souza, Mariano
dc.creatorLang, Michael
dc.date2014-05-27T11:26:53Z
dc.date2016-10-25T18:37:41Z
dc.date2014-05-27T11:26:53Z
dc.date2016-10-25T18:37:41Z
dc.date2012-08-01
dc.date.accessioned2017-04-06T01:59:50Z
dc.date.available2017-04-06T01:59:50Z
dc.identifierReview of Scientific Instruments, v. 83, n. 8, 2012.
dc.identifier0034-6748
dc.identifierhttp://hdl.handle.net/11449/73461
dc.identifierhttp://acervodigital.unesp.br/handle/11449/73461
dc.identifier10.1063/1.4747272
dc.identifier2-s2.0-84865752762.pdf
dc.identifier2-s2.0-84865752762
dc.identifierhttp://dx.doi.org/10.1063/1.4747272
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/894267
dc.descriptionWe 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.
dc.languageeng
dc.relationReview of Scientific Instruments
dc.rightsinfo:eu-repo/semantics/closedAccess
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 pressure
dc.typeOtro


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