Simultaneous measurement of shear modulus and torsional resonance of polycrystalline solid helium-4 = 다결정성 고체 헬륨의 층밀리기 탄성률과 공명 주파수 동시 측정에 관한 연구

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dc.contributor.advisorKim, Eunseong-
dc.contributor.advisor김은성-
dc.contributor.authorShin, Jaeho-
dc.contributor.author신재호-
dc.date.accessioned2017-03-28T07:14:12Z-
dc.date.available2017-03-28T07:14:12Z-
dc.date.issued2016-
dc.identifier.urihttp://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=663080&flag=dissertationen_US
dc.identifier.urihttp://hdl.handle.net/10203/221119-
dc.description학위논문(박사) - 한국과학기술원 : 물리학과, 2016.8 ,[viii, 79 p. :]-
dc.description.abstractTo understand the relation between the resonant period drop of the torsional oscillator (TO) containing the solid helium and its elastic modulus change, we simultaneously measure both phenomena using a TO by inserting concentric piezoelectric (PZT) transducer. Even we observe the similarities of the temperature, 3He concentration and frequency, remarkable discrepancy in the amplitude responses are observed. To investigate this result, we construct the perpendicularly stacked PZT transducers to measure the shear modulus in parallel to and perpendicular to the driving displacement direction. We find that our samples are composed of a few of highly oriented gains or a sufficiently small number of domains connected with a certain preferential orientation. Therefore, the discrepancies in the drive dependence of simultaneous measurement is originated from a change of an elastic property of solid helium.-
dc.languageeng-
dc.publisher한국과학기술원-
dc.subjectSolid helium-
dc.subjectTorsional oscillator-
dc.subjectShear modulus-
dc.subjectSupersolid-
dc.subjectsupfluid-
dc.subject고체 헬륨-
dc.subject비틀림 단진자-
dc.subject층밀리기 탄성률-
dc.subject초고체-
dc.subject초유체-
dc.titleSimultaneous measurement of shear modulus and torsional resonance of polycrystalline solid helium-4 = 다결정성 고체 헬륨의 층밀리기 탄성률과 공명 주파수 동시 측정에 관한 연구-
dc.typeThesis(Ph.D)-
dc.identifier.CNRN325007-
dc.description.department한국과학기술원 :물리학과,-
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PH-Theses_Ph.D.(박사논문)
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