Chemical Reduction of Nd_1.85Ce_0.15CuO_4−δ Powders in Supercritical Sodium Ammonia Solutions

Figure 2

Magnetic susceptibility of treated Nd_1.85Ce_0.15CuO_3.961 as a function of temperature . The zero-field-cooled measurement is carried out under 10 Oe. The insert shows enlarged susceptibility as a function of temperature near the transition. The powders are ammonothermally reduced at 54°C in sodium ammonia solutions.