Low-temperature characteristics of Matsushita carbon resistors with and without magnetic fields

✍ Scribed by Y. Koike; T. Fukase; S. Morita; M. Okamura; N. Mikoshiba

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 266 KB
• Volume: 25
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(85)90072-4

✦ Synopsis

The resnslan('e versus lemperalure (R-/') characlernslnc:s arid magneturesnsldrice (MR) ul 1,"8 W nominal 68,O. and 1 O0 D. Malsushila carbon reslslors ul grade E RC-18SG hdve been measured al lemperalures belween 8 and O 05 K, m magnel,:, helds up Io 84 kOe (84 x 10%/4 n Am-I). In bolh carbon reslslors, Ihe R-/" behaviour is expressed as R(T) = R2exp{( l:)/" T) ~ 21 in the high lemperalure region and as R(/') = R4exp{(f4/'l')~'41 in lhe h:)w lemperalure reg0on. These relalionships are explained as due Io variable-range hopping conduclnon wnlh arid wilhoul Ihe changing energy belween isolaled racialist grams, respeclively. Negal0ve and posllive MR's have L)een observecl in low and high magnelic llelds, respeclively The negalive MR mcreasP.s wilh decreasing lemperalure al very low lemperalures .... O. 1 K. These phenomena are chscussed irl lerms ol Ihe lheory based on Ihe slrong Anderson Iocahzalion.