MUON-SPIN-ROTATION STUDIES IN SINGLE-CRYSTAL SR2CUO2CL2
MUON-SPIN-ROTATION STUDIES IN SINGLE-CRYSTAL SR2CUO2CL2
复制标题
DOI：
10.1103/physrevb.42.2182
复制
发表时间：
1990-08-01
影响因子：
3.7
通讯作者：
MILLER, LL
中科院分区：
文献类型：
--
作者：
LE, LP;LUKE, GM;MILLER, LL
本文报道了Sr 2CuO 2Cl 2单晶在5 ~ 300 K温度范围内的零场μ子自旋转动研究。在Néel温度以下观察到磁序，并将结果与中子衍射测量结果进行了比较。μ子进动频率的温度依赖性表现出二维自旋1/2系统的特性，具有占主导地位的海森堡相互作用和非常小的各向异性。μ子旋进频率在60 K以下的分裂表明了磁相变或μ+位置的变化。通过比较观测到的静态内场和由Cu 2+磁矩计算得到的偶极场，发现MON位位于CuO 2面中心附近。
We report zero-field muon-spin-rotation studies on single crystals of Sr 2 CuO 2 Cl 2 between 5 and 300 K. Magnetic order below the Néel temperature is observed, and the results are compared with those of neutron diffraction measurements. The temperature dependence of the muon precession frequencies exhibits properties characteristic to two-dimensional spin-1/2 systems with a dominant Heisenberg interaction and very small anisotropy. The splitting of the muon precession frequency below 60 K indicates either a magnetic phase transition or a change in the μ+ site. By comparing the observed static internal field with the calculated dipolar field from Cu 2+ moments in the crystal we found that the moun sites are located near the center of CuO 2 planes.