QUENCHING OF SPIN FLUCTUATIONS BY HIGH MAGNETIC-FIELDS

The quenching of spin fluctuations by magnetic fields has been observed in heat capacity and electrical resistivity measurements at low temperatures for a series of highly exchange enhanced magnetic materials. These include: the weak itinerant electron ferromagnets Sc3In, Zr1-xHfxZn2 (0 less-than-or-equal-to x less-than-or-equal-to 0.2) and Ni3Al; the strong Pauli paramagnets RCo2(R = Sc, Y and Lu), TiBe2 and Pd1-xNix (0 less-than-or-equal-to x less-than-or-equal-to 0.01); and the heavy fermion systems CeSn3, CeSix (x almost-equal-to 1.85) and UAl2. The reported quenching of spin fluctuations in scandium and palladium by magnetic fields is reviewed, and it appears that the initial observations and conclusions are incorrect, and that fields greater than 10 and 40 T, respectively, will be necessary to quench spin fluctuations in these metals. The behaviors of these spin fluctuations in these metals. The behaviors of these spin fluctuators have been grouped into six classes.