Transport and Cu NMR studies of charge and spin dynamics in PrBa2Cu4O8
Transport and Cu NMR studies of charge and spin dynamics in PrBa2Cu4O8
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PrBa2Cu4O8 中电荷和自旋动力学的输运和 Cu NMR 研究
DOI：
10.1007/bf00768425
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发表时间：
1996
影响因子：
2
通讯作者：
K. Tanabe
中科院分区：
文献类型：
--
作者：
J. Kikuchi;I. Terasaki;T. Machi;N. Koshizuka;Chizuko Murayama;N. Mōri;Nobuaki Seiji;S. Adachi;K. Tanabe
通过输运和Cu NMR测量研究了PrBa_2Cu_4O_8的电荷和自旋动力学。发现在高温下磁电阻很小，在低于100 K时随着温度的降低磁电阻迅速增加，这可能是由于CuO双链中电荷输运从一维到二维的空间交叉.虽然从链Cu网站的NMR信号持续下降到4.2 K没有任何明显的线加宽，从平面Ce网站的信号消失低于250 K，表明长程反铁磁秩序的平面Cu矩。这与金属导电沿着准一维CuO链的观点是一致的。
The charge and spin dynamics in PrBa2Cu4O8 are investigated by means of transport and Cu NMR measurements. The magnetoresistance was found to be very small at high temperatures and increase rapidly with decreasing temperature below∼ 100 K, which may be ascribed to the dimensional crossover from one to two dimensions in the charge transport in the CuO double chains. While the NMR signal from the chain Cu sites persists down to 4.2 K without any appreciable line broadening, the signal from the planar Ce sites disappears below∼ 250 K indicating the long-range antiferromagnetic order of plane Cu moments. This is consistent with the view of metallic conduction along the quasi one-dimensional CuO chains.