Bridgman压砧对液体压力介质的适应性
Adaptation of the Bridgman anvil cell to liquid pressure mediums
摘要：
Bridgman压砧压力传感器的优点是其压力范围宽，并且可以将大量的金属丝引入压力室。在这些压力单元中，使用软固体压力介质，如滑石。我们已经成功地使布里奇曼电解槽适应液体压力介质。有了这一突破，现在可以在非常好的流体静压条件下测量高达7 GPa，这是活塞缸电池中可达到的压力的两倍。在细胞中的压力梯度，估计从超导过渡宽度的铅，减少了五个因素，在液体介质相对于滑石。通过使用非磁性材料的砧座和夹具，并由于后者的小尺寸，我们的设备是特别适合在稀释冰箱的磁输运测量。这种压力传感器被开发用于测量非常脆弱和易碎的样品，如有机导体。在固体和液体压力介质中进行的（TMTTF）2BF4的电阻率测量证明了在高压下研究有机导体的流体静压条件的必要性。
英文摘要：
The advantage of Bridgman anvil pressure cells is their wide pressure range and the large number of wires which can be introduced into the pressure chamber. In these pressure cells soft solid pressure mediums like steatite are used. We have succeeded in adapting the Bridgman cell to liquid pressure mediums. With this breakthrough it is now possible to measure in very good hydrostatic pressure conditions up to 7 GPa, which is about twice the pressure attainable in piston-cylinder cells. The pressure gradient in the cell, estimated from the superconducting transition width of lead, is reduced by a factor of five in the liquid medium with respect to steatite. By the use of non-magnetic materials for the anvils and the clamp and due to the small dimensions of the latter, our device is specially suitable for magneto-transport measurements in dilution fridges. This pressure cell has been developed to measure very fragile and brittle samples like organic conductors. Resistivity measurements of (TMTTF)2BF4 performed in a solid and liquid pressure medium demonstrate the necessity of hydrostatic pressure conditions for the study of organic conductors at high pressures.
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