Cooling a magnetic resonance force microscope via the dynamical back action of nuclear spins

2009 ◽  
Vol 80 (21) ◽  
Author(s):  
Ya. S. Greenberg ◽  
E. Il’ichev ◽  
Franco Nori
Keyword(s):  
Magnetic Resonance ◽  
Nuclear Spins ◽  
Back Action ◽  
Magnetic Resonance Force Microscope

REALISTIC SIMULATIONS OF SINGLE-SPIN MEASUREMENT VIA MAGNETIC RESONANCE FORCE MICROSCOPY

2005 ◽  
Vol 03 (supp01) ◽  
pp. 1-9 ◽  
Author(s):  
TODD A. BRUN ◽  
HSI-SHENG GOAN
Keyword(s):  
Magnetic Resonance ◽  
Thermal Noise ◽  
Quantum Information Processing ◽  
Nuclear Spins ◽  
Magnetic Resonance Force Microscopy ◽  
Force Microscopy ◽  
Single Spin ◽  
Structure Of Molecules ◽  
Spin Level ◽  
Back Action

The problem of measuring single electron or nuclear spins is of great interest for a variety of purposes, from imaging the structure of molecules to quantum information processing. One of the most promising techniques is magnetic resonance force microscopy (MRFM), in which the force between a spin and a small permanent magnet resonantly drives the oscillations of a microcantilever. Numerous issues arise in understanding this system: thermal noise in the cantilever, shot-noise and back-action from monitoring the cantilever's motion, spin relaxation, and interaction with higher cantilever modes. Detailed models of these effects allow one to assess their relative importance and the necessary improvements for sensitivity at the single-spin level.

Field focusing n.m.r. (FONAR) and the formation of chemical images in man

1980 ◽  
Vol 289 (1037) ◽  
pp. 489-500 ◽  
Keyword(s):  
Magnetic Resonance ◽  
Medical Diagnosis ◽  
Malignant Disease ◽  
Small Volume ◽  
Static Field ◽  
Nuclear Resonance ◽  
Nuclear Spins ◽  
Frequency Condition ◽  
Driving Field ◽  
Nuclear Magnetization

The first proposals for n.m r. scanning in medical diagnosis were made by Damadian (1971 a ; 1972) and were followed by Lauterbur (1973). Damadian’s method of scanning used the principle that the forced precessions of a nuclear magnetization under radio frequency (r.f.) driving field specify the conditions for obtaining spatial resolution of the signal producing domains of a nuclear resonance sample. Sufficient coupling of the nuclear spins to the radiation field to produce a signal detectable by r.f. spectroscopy requires that the stringent Bohr frequency condition, hv = µH 0 /I , be met. It became possible to construct, with the aid of direct current auxiliary coils, a small volume, called the resonance aperture, inside the applied static field of the magnetic resonance experiment. The correct value of H 0 for the applied frequency is restricted to this aperture. The technique (Damadian 1972) was developed to provide a method for non-surgically detecting chemical abnormalities in the diseased organs of patients (Damadian 1971 a ). The first n.m.r. scans of normal patients and of those with malignant disease are discussed.

Development of an X-band magnetic resonance force microscope

2007 ◽  
Vol 310 (2) ◽  
pp. 2713-2715 ◽  
Author(s):  
M. Toda ◽  
N. Ohno ◽  
T. Fujita ◽  
T. Kanemaki ◽  
S. Mitsudo ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
X Band ◽  
Magnetic Resonance Force Microscope
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