Abstract

In two-dimensional (2D) systems, it is possible to exactly match a static and a radiofrequency (RF) magnetic field. An arbitrary angle can be put between two fields, and this angle is constant everywhere in the space. Moreover, the modulus of the fields are linked by a proportionality factor. This result is based on the easy-axis rotation theorem and the amperian current model of permanent magnets. It is useful in portable nuclear magnetic resonance (NMR) applications, where a RF magnetic field perpendicular and correlated to a static magnetic field is needed. A small NMR probe based on this principle was developed.

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