Superfluid Transition of 4He in Porous Gold Studied with Quartz Crystal Resonator
Superfluid Transition of 4He in Porous Gold Studied with Quartz Crystal Resonator
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DOI：
10.1063/1.2354701
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发表时间：
2006-12
影响因子：
0.8
通讯作者：
T. Kato;M. Hieda;Kazuhisa Wataru;Masaru Suzuki;T. Matsushita;N. Wada
中科院分区：
文献类型：
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作者：
T. Kato;M. Hieda;Kazuhisa Wataru;Masaru Suzuki;T. Matsushita;N. Wada
用石英晶体谐振器测量了孔径为390a、孔隙率为70%的多孔金的全孔4He超流密度。超流密度临界指数为0.72±0.03，与体积4He的超流密度临界指数0.6705±0.0006非常接近。超流体转变温度Tc比4He体的转变温度Tλ降低了6±2 mK。这种减少与限制在各种多孔介质中的4He的Tc的孔径依赖性一致。
We measured the superfluid density of full pore 4He in porous gold with pores 390 A in diameter and 70% in porosity by a quartz crystal resonator. The superfluid density critical exponent is found to be 0.72 ± 0.03 which is very close to that of bulk 4He, 0.6705 ± 0.0006. The superfluid transition temperature Tc shows a reduction of 6±2 mK from Tλ, the transition temperature of bulk 4He. This reduction is in agreement with the pore‐size dependence of Tc of 4He confined in various porous media.