Longitudinal-field micro+ spin relaxation via quadrupolar level-crossing resonance in Cu at 20 K.
Longitudinal-field micro+ spin relaxation via quadrupolar level-crossing resonance in Cu at 20 K.
复制标题
20 K 下铜中四极能级交叉共振的纵向场微自旋弛豫。
DOI：
10.1103/physrevlett.56.181
复制
发表时间：
1986
影响因子：
8.6
通讯作者：
Ansaldo
中科院分区：
文献类型：
--
作者：
Kreitzman;Brewer;Harshman;Keitel;Williams;Crowe;Ansaldo
本文报道了在μ~+塞曼分裂和μ~+最近邻核的诱导四极耦合之间的水平交叉共振下，通过动态去极化首次探测到μ~+自旋共振场弛豫。μ +弛豫速率随外加磁场B的变化在能级交叉共振处有一峰值。在20 K下，[111]轴平行于B的单晶Cu中，共振场为B res = 80.9 ± 0.4 G，半峰全宽为21.7 ± 1.7 G。这种方法应该有助于澄清Cu中μ +的有争议的低温运动。
We report the first detection of resonant longitudinal-field μ+ spin relaxation via dynamic depolarization at a level-crossing resonance between the μ+ Zeeman splitting and the induced quadrupolar coupling of the muon’s nearest-neighbor nuclei. The μ+ relaxation rate as a function of external magnetic field B has a peak at the level-crossing resonance. In single-crystal Cu at 20 K with the [111] axis parallel to B the resonance occurs at a field of B res= 80.9±0.4 G with a full width at half maximum of 21.7±1.7 G. This approach should help clarify the controversial low-temperature motion of the μ+ in Cu.