| 报告题目 | Probing Materials Using Radioactive Local Probes: An Introduction to the μSR and βNMR Techniques |
| 报告人 | Dr. Iain McKenzie |
| 报告人单位 | TRIUMF Centre for Molecular and Materials Science and a Research Associate at the Department of Chemistry at Simon Fraser University |
| 报告时间 | 2013-05-13 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室 |
| 主办单位 | 合肥微尺度物质科学国家实验室 |
| 报告介绍 | 报告摘要
The Centre for Molecular and Materials Science (CMMS) at TRIUMF provides intense beams of spin-polarized muons and radioactive ions for Canadian and international researchers to probe materials at the molecular level. Material properties are determined using a series of magnetic resonance techniques known as μSR (muon spin rotation, relaxation and resonance) and βNMR (beta-detected nuclear magnetic resonance) that exploit the parity violating decay of the probes. I will review the μSR technique and give examples of how It can be used to obtain unique information about a wide range of phenomena in physics and chemistry, such as magnetic ordering and spin dynamics, internal field distributions in superconductors and the behaviour of free radicals in bulk materials. I will introduce the βNMR technique and show that it provides a window into magnetism, superconductivity and polymer dynamics near surfaces, at buried interfaces and in thin films.
The CMMS facility is in the middle of a large expansion. One new μSR beam line with two end stations and the capability of Performing high frequency and long time range measurements is being commissioned and a second new μSR beam line is nearing completion. We are also expecting a three-fold increase in the time available for βNMR experiments due to the construction of the Advanced Rare Isotope Laboratory (ARIEL). We are actively seeking new experiments to make use of our world-leading facilities. |
