Josephson‐junction method detects nmr transitions

In nuclear‐magnetic‐resonance work, the detection of broad lines such as those from solid samples has usually been done by observing a pulse in a radiofrequency pickup coil while carrying out a procedure known as “adiabatic fast passage.” A new technique, in which detection during adiabatic fast passage is by a Josephson‐junction magnetometer, does the same job but with considerably less radiofrequency power.