Contributed Papers
Magnetism and Magneto-resistance of a CrO2/RuO2 Granular System
2007 Volume 31 Issue 3 Pages 149-152
Details
2007 Volume 31 Issue 3 Pages 149-152
After mixing RuO2 and CrO2 powders, (RuO2)x (CrO2)1-x was sintered at a low temperature of 473 K. The effects of using an RuO2 spacer between CrO2 grains were systematically studied for values of x between 0 and 1. The x-dependence of the averaged saturation magnetic moment μ s per transition metal ion abruptly decreased even at x = 0.03, and it linearly varied in the range 0.3 ≤ x ≤ 1, where the estimated magnetic moment per Cr ion was 1.43 μ B, a 30% reduction from the value of 2 μ B for pure CrO2. The magneto-resistance ratio (MRR) remained almost unchanged in the range 0 ≤ x ≤ 0.7.
