Question

Difference between giant and colossal magnetoresistance

Answer 1

Explanation:

At Curie point TC=126 K we have observed a large volume contraction ΔV/V≈0.1%, an abrupt minimum in the temperature dependence of negative volume magnetostriction ω(T) and a maximum in the temperature dependence of resistivity ρ(T).

We have obtained giant negative volume magnetostriction ω≈−5×10−4 in a relatively low magnetic field B=0.9 T, which is accompanied by a colossal negative magnetoresistance (CMR) equal to 44% in the same magnetic field.

These properties are explained by a magnetic two-phase state.