Low temperature susceptibility compensation
First Claim
1. An amorphous composition comprising an amorphous matrix, a metal ion selected from the group consisting of Gd3+, Fe+3 and Mn+2, and a ligand, said composition having a selected induced magnetization at cryogenic temperatures.
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Accused Products
Abstract
An composition exhibiting a desired value of magnetic susceptibility, which can be used to fabricate components in an NMR device, and method thereof, wherein the composition comprises a metal ion selected from the group consisting of Gd+3, Fe+3 and Mn+2 and an amorphous material using a ligand or chelating agent to solubilize the metal ion throughout the marphous material, wherein the magnetic susceptibility of the composition exhibits a desired value at cryogenic temperatures such as nearly zero susceptibility at temperatures at or below 77° K.
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Citations
19 Claims
- 1. An amorphous composition comprising an amorphous matrix, a metal ion selected from the group consisting of Gd3+, Fe+3 and Mn+2, and a ligand, said composition having a selected induced magnetization at cryogenic temperatures.
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11. A method of preparing an amorphous composition to exhibit a desired susceptibility at cryogenic temperatures, comprising the steps of:
mixing a metal ion selected from the group consisting of Gd3+, Fe+3 and Mn+2, with an amorphous matrix and a ligand so that the resulting composition has a nearly zero magnetic susceptibility at said cryogenic temperatures. - View Dependent Claims (12, 13, 14)
- 16. An NMR apparatus comprising a magnet for producing a polarizing field and utilizing a composition subject to said polarizing field, said composition an amorphous comprising a selected amorphous material and a metal ion selected from the group consisting of Gd3+, Fe+3 and Mn+2, and a ligand said composition having a selected value of magnetizationat cryogenic temperatures.
Specification