Observation of the Nuclear Barnett Effect

被引:18
作者
Arabgol, Mohsen [1 ]
Sleator, Tycho [1 ]
机构
[1] NYU, Dept Phys, 726 Broadway, New York, NY 10003 USA
关键词
MAGNETIZATION;
D O I
10.1103/PhysRevLett.122.177202
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We have made the first observation of the nuclear Barnett effect. In the electronic Barnett effect, which was first observed in 1915 by Samuel Barnett, a ferromagnetic rod was spun about its long axis and a magnetization developed in the rod along the axis of rotation. This effect is caused by the coupling between the angular momentum of the electronic spins in the sample and the rotational motion of the rod. In our experiment, we measured the nuclear Barnett effect by rotating a sample of water at rotational speeds up to 13.5 kHz in a weak magnetic field and observed a change in the polarization of the protons in the sample that is proportional to the frequency of rotation. We measured this polarization by observing the change in the size of a nuclear magnetic resonance (NMR) signal. No NMR frequency shift was observed due to rotation, meaning that this magnetization was not produced by a real magnetic field.
引用
收藏
页数:5
相关论文
共 24 条
[1]  
Abragham A., 1961, The Principles of Nuclear Magnetism
[2]   NUCLEAR MAGNETIC RESONANCE SPECTRA FROM A CRYSTAL ROTATED AT HIGH SPEED [J].
ANDREW, ER ;
BRADBURY, A ;
EADES, RG .
NATURE, 1958, 182 (4650) :1659-1659
[3]  
[Anonymous], 1956, INVESTIGATION THEORY
[4]  
[Anonymous], 1996, Springer Series in Solid-State Sciences
[5]  
[Anonymous], 1977, Statistical Physics
[6]  
Arabgol M., 2016, THESIS
[7]  
Barnett S.J., 1917, PHYS REV, V10, P7
[8]   Magnetization by rotation. [J].
Barnett, SJ .
PHYSICAL REVIEW, 1915, 6 (04) :239-270
[9]   Gyromagnetic and electron-inertia effects [J].
Barnett, SJ .
REVIEWS OF MODERN PHYSICS, 1935, 7 (02) :0129-0166
[10]  
BLOCH F, 1946, PHYS REV, V70, P460, DOI 10.1103/PhysRev.70.460