|
|
|
| RESISTIVITY MINIMUM IN ANTIFERROMAGNETIC γ-Fe-Mn BASE ALLOYS CONTAINING Al OR Si |
| by ZHANG Yansheng (Dalian Railway Lnstitute) (Manuscript received 2 June; 1986) |
|
Cite this article:
by ZHANG Yansheng (Dalian Railway Lnstitute) (Manuscript received 2 June; 1986). RESISTIVITY MINIMUM IN ANTIFERROMAGNETIC γ-Fe-Mn BASE ALLOYS CONTAINING Al OR Si. Acta Metall Sin, 1987, 23(4): 306-312.
|
|
|
Abstract The effect of Al, Si and Cr on the temperature dependence of susceptibility, X, and resistivity, ρ, of γ-Fe-Mn (23.8-31.6at.-%) alloys containing Al, Si and Cr has been investigated over the temperature range of 77-750K and 4.3-48GK. respectively. The Cr was detected to be slightly influenced upon their x and X-T or ρ-T. And it does not enable the matrix to form a localized net moment associated with Fe atoms. While the addition of certain amount of Al or Si may remarkably modify the magnetic structure as well as the temperature dependence of X or ρ. With the increase of antiferromagnetic transition resistivity below the Neel temperature, a resistivity minimum appears and then present a negative tem- perature coefficient. Down to 4.3 K, neither anomaly for resistivity of γ-Fe-Mn and γ-Fe-Mn-Cr alloys was found within experimental accuracy, but the secondary resistivity minimum was observed in γ-Fe-Mn alloys containing Al or Si. The temperature of minimum T_(min)~(2), and the depth of minimum △ρ(ρ_(4k)—ρ_r_(min)~(2)) of resistivity increase with the increase of concentration of Al or Si. The resistivity increases linearly with the decrease of lgT between T_(min)~(2) and 4K. It seems to be proposed that the formation of a localized magnetic net moment on Fe atoms and the transition from the incommensurate SDW state to commensurate SDW one are caused by the resistivity minimum in antiferromagnetic γ-Fe-Mn alloys with an addition of Al or Si, thus the low temperature resistivity minimum is due to the Rondo-like effect.
|
|
Received: 18 April 1987
|
1 Kondo J. Prog Theor Phys, 1964; 32: 37
2 Katano S, Mori N. J Phys Soc Jpn, 1979; 46: 1265
3 Katano S, Mori N, Nakayama K. J Phys Soc Jpn, 1980; 48: 192
4 Arajs S, Dunmyre G R, Dechter S J. Phys Rev, 1967; 154: 448
5 Lomer W M. Proc Phys Soc 1962; 80: 489
6 Asano S, Yamashita J. J Phys Soc Jpn, 1971; 31: 1000
7 Endoh Y, Ishikswa Y. J Phys Soc Jpn, 1971; 30: 1614
8 张彦生.金属学报,1985;21:A295
9 张彦生.金属学报,1986;22 A470
10 张彦生.金属学报,1984;20:A313
11 Arajs S, Dunmyre G R. J Appl Phys, 1967; 38: 1157
12 Wolff P A. Phys Rev, 1961; 124: 1030
13 Suzuki T. J Phys Soc Jpn, 1966; 21: 442a |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
