A high pressure bomb for work at low temperatures

✍ Scribed by E.S. Itskevich

• Publisher: Elsevier Science
• Year: 1964
• Tongue: English
• Weight: 269 KB
• Volume: 4
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(64)90077-3

✦ Synopsis

A SIMPLE apparatus is described below for attaining hydrostatic pressures up to 11 katm at temperatures attainable with liquefied gases.

A brief discussion of all the methods for obtaining high pressures at-low temperatures is given by Brandt and Ginzburg. ~ The main difficulty in designing such an apparatus lies in the absence of a plastic medium at low temperatures to transmit the force from the piston to the specimen strictly hydrostatically and consequently without damaging the specimen. While such damage is unimportant in studying the effect of pressure on the transition temperature of superconductors or in studies of polycrystalline material,~, -" it is not negligible when investigating the electrical and galvanomagnetic properties of metals and semiconductors, which is usually done on single crystals: in fact, the effect of the damage is often many times greater than the effect being studied. We shall illustrate this below.

The method described here for producing the pressure is closest to that described by Vereshchagin et al., 3 in which mechanical fixing of the high pressure in benzene was used for X-ray studies at room temperature. The method developed was used in studying cerium and has been described briefly. 4