Fourth sound measurement of superfluid 3He in aerogel

Y. Nago; K. Obara; R. Kado; H. Yano; O. Ishikawa; T. Hata

doi:10.1007/s10909-007-9455-1

Fourth sound measurement of superfluid ³He in aerogel

Y. Nago, K. Obara, R. Kado, H. Yano, O. Ishikawa, T. Hata

Department of Physics

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The fourth sound resonance experiment has been done on liquid ³He in 98.5% porosity aerogel. Aerogel was grown inside the pores among the sintered silver powder to avoid the vibration of the aerogel strands by the sound experiment. The measurement was performed at zero magnetic field and 27 bar. We observed the phase transition between the A-like and B-like phases and also their coexistent state. The A-like to B-like phase transition occurs not at a temperature but within a temperature band. In this band, the A-like phase gradually converts to the B-like phase. Possible picture of the coexistent state is discussed.

Original language	English
Pages (from-to)	597-601
Number of pages	5
Journal	Journal of Low Temperature Physics
Volume	148
Issue number	5-6
DOIs	https://doi.org/10.1007/s10909-007-9455-1
Publication status	Published - 2007 Sept

Keywords

67.57.-z
67.57.De
67.57.Pq
74.84.-g

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Materials Science(all)
Condensed Matter Physics

Access to Document

10.1007/s10909-007-9455-1

Cite this

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title = "Fourth sound measurement of superfluid 3He in aerogel",

abstract = "The fourth sound resonance experiment has been done on liquid 3He in 98.5% porosity aerogel. Aerogel was grown inside the pores among the sintered silver powder to avoid the vibration of the aerogel strands by the sound experiment. The measurement was performed at zero magnetic field and 27 bar. We observed the phase transition between the A-like and B-like phases and also their coexistent state. The A-like to B-like phase transition occurs not at a temperature but within a temperature band. In this band, the A-like phase gradually converts to the B-like phase. Possible picture of the coexistent state is discussed.",

keywords = "67.57.-z, 67.57.De, 67.57.Pq, 74.84.-g",

author = "Y. Nago and K. Obara and R. Kado and H. Yano and O. Ishikawa and T. Hata",

note = "Funding Information: Acknowledgements We thank Mr. H. Yokogawa and Mr. M. Yokoyama of Advanced Technology Research Laboratory in Matsushita Electric Works. Ltd. for preparing aerogels. This research is supported by Grant-in-Aid for Scientific Research on Priority Areas (Grant No. 17071009) from The Ministry of Education, Culture, Sports, Science and Technology of Japan.",

year = "2007",

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doi = "10.1007/s10909-007-9455-1",

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T1 - Fourth sound measurement of superfluid 3He in aerogel

AU - Nago, Y.

AU - Obara, K.

AU - Kado, R.

AU - Yano, H.

AU - Ishikawa, O.

AU - Hata, T.

N1 - Funding Information: Acknowledgements We thank Mr. H. Yokogawa and Mr. M. Yokoyama of Advanced Technology Research Laboratory in Matsushita Electric Works. Ltd. for preparing aerogels. This research is supported by Grant-in-Aid for Scientific Research on Priority Areas (Grant No. 17071009) from The Ministry of Education, Culture, Sports, Science and Technology of Japan.

PY - 2007/9

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N2 - The fourth sound resonance experiment has been done on liquid 3He in 98.5% porosity aerogel. Aerogel was grown inside the pores among the sintered silver powder to avoid the vibration of the aerogel strands by the sound experiment. The measurement was performed at zero magnetic field and 27 bar. We observed the phase transition between the A-like and B-like phases and also their coexistent state. The A-like to B-like phase transition occurs not at a temperature but within a temperature band. In this band, the A-like phase gradually converts to the B-like phase. Possible picture of the coexistent state is discussed.

AB - The fourth sound resonance experiment has been done on liquid 3He in 98.5% porosity aerogel. Aerogel was grown inside the pores among the sintered silver powder to avoid the vibration of the aerogel strands by the sound experiment. The measurement was performed at zero magnetic field and 27 bar. We observed the phase transition between the A-like and B-like phases and also their coexistent state. The A-like to B-like phase transition occurs not at a temperature but within a temperature band. In this band, the A-like phase gradually converts to the B-like phase. Possible picture of the coexistent state is discussed.

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KW - 67.57.Pq

KW - 74.84.-g

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