An apparatus for studying friction and wear at low temperatures in vacuum

✍ Scribed by N.N. Golego; E.A. Kul'gavyi

• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 210 KB
• Volume: 14
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(74)90233-1

✦ Synopsis

Resolution of fine (hyperfine) structure. As a result of the exchange interaction between the localized magnetic moment and the conduction electrons, esr spectra often exhibit exchange narrowed or broadened fine (hyperfine) structure. The narrowing or broadening mechanism depends on the strength of the localized to conduction electron exchange relaxation rate and is therefore proportional to the temperature. Fine (hyperfine) resolution may often be possible only at very low temperatures as a result. Important information about the dynamics of the conduction electrons could then be extracted, as well as a direct determination made of the fine (hyperfine) parameter.

(c) Observation of esr in the superconducting state. Here again, a wide temperature range is needed to observe esr first in the superconducting state far below the superconducting transition temperatures Tc, secondly in the gapless regime, T = Tc, and thirdly in the normal state, T>~ Tc.