Magnetoresistance of 5N, 6N, and 6N8 high purity aluminum
Magnetoresistance of 5N, 6N, and 6N8 high purity aluminum
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5N、6N、6N8高纯铝磁阻
DOI：
10.1063/1.4712090
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
T. Shintomi
中科院分区：
文献类型：
--
作者：
H. Hoshikawa;T. Megumi;H. Tabuchi;K. Sasaki;T. Tomaru;T. Shintomi
用四丝法测量了高纯铝在4.2K、垂直和平行方向上的电阻率，磁场强度为15 T。使用三种不同纯度的线材试样研究铝纯度的影响，即，5 N和6 N-Al，它们是可商购的，以及6 N8-Al，其是从6 N-Al进一步纯化的。当施加垂直于电流方向的磁场时，RRR（剩余电阻率比）随着磁场的增加而下降，15 T时的RRR具有约为0 T时的1/3的值。当磁场方向与电流方向平行时，样品的电阻率比磁场方向与电流方向平行时的电阻率高，且样品的磁电阻行为随样品纯度的不同而不同。6 N-Al和6N_8-Al的RRR随磁场强度的增加而增加，并在磁场强度超过1 T时保持较高的相对稳定性。
The electrical resistivity of high purity aluminum was measured in a magnetic field of up to 15 T in both the perpendicular and the parallel directions at 4.2 K with the four wire method. The effect of aluminum purity was investigated using wire specimens of three different purities, i.e., 5N and 6N-Al, which are commercially available, and 6N8-Al, which was further purified from 6N-Al. Specimens of commercial 5N copper were also tested for comparison. When a magnetic field was applied perpendicular to the current direction, RRR (residual resistivity ratio) declined with an increase in the field, with RRR at 15 T having a value that was about a third of that at 0 T. When the magnetic field was applied parallel to the current direction, RRR tended to show higher values than the former case, and the magnetoresistance behavior differed with the purity. While RRR of 5N-Al dropped sharply below 1 T and was almost constant over 1 T, RRR of 6N-Al and 6N8-Al increased with the magnetic field and maintained its hi...