Mechanical detection of nuclear spin relaxation in a micron-size crystal

被引:18
作者
Klein, O
Naletov, VV
Alloul, H
机构
[1] Ecole Polytech, Solides Irradies Lab, F-91128 Palaiseau, France
[2] Kazan State Univ, Dept Phys, Kazan 420008, Russia
关键词
D O I
10.1007/s100510070160
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
A room temperature nuclear magnetic resonance force microscope (MRFM), fitted in a 1 tesla electromagnet, has been used to measure the nuclear spin relaxation of H-1 in a micron-size (70 ng) crystal of ammonium sulfate. NMR sequences, combining both pulsed and continuous wave radio-frequency fields, have allowed us to measure mechanically T-2 and T-1, the transverse and longitudinal spin relaxation times. Because two spin species with different T-1 values are measured in our 7 mu m thick crystal, magnetic resonance imaging of their spatial distribution inside the sample section have been performed. To understand quantitatively the measured signal, we carefully study the influence of spin-lattice relaxation and non-adiabaticity of the continuous-wave sequence on the intensity and time dependence of the detected signal.
引用
收藏
页码:57 / 68
页数:12
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