Solution pairs with ferromagnetic properties for magnetic measurements with magnetic resonance and electronic resonance

摘要

1,199,232. Magnetic resonance magnetometers. COMMISSARIAT A L'ENERGIE ATOMIQUE. March 1, 1968 [March 9, 1967; Feb. 7, 1968], No.10052/68. Heading GIN. In a nuclear magnetic resonance magnetometer of the spin-coupling oscillator type, comprising two samples arranged to compensate for parasitic magnetic fields in the manner described with reference to Fig. 3 of Specification 1, 137, 302, the samples comprise two different solutions of triacetoneamine nitroxide (TANO) having a common electronic resonance line and a common nuclear magnetic resonance line, saturation of the electronic resonance line producing in one of the solutions an absorption of energy at the n.m.r. frequency and in the other solution a stimulated emission of energy at the n.m.r. frequency. In one embodiment, one solution is a millimolecular solution of TANO in pure dimethoxyethane (DME) and the other is a millimolecular solution of TANO in pure methanol. In a second embodiment, one solution is a millimolecular solution of TANO in pure DME and the other is a millimolecular solution of TANO in a mixture of 73% by volume of DME and 27% water. In a third embodiment, one solution is a millimolecular solution of TANO in a mixture of 73% by volume of DME and 27% water and the other is a millimolecular solution of TANO in a mixture of 88% by volume of methanol and 12% water. The pairs of solutions may be used in magnetometers described in Specification 1, 193, 468 having four samples arranged so that unwanted signals due to displacement or rotation of the magnetometer or due to parasitic magnetic fields cancel.