Magnetism of spinel microcrystals in a Cr3+ -doped cordierite glass : an E. S. R. study C. Blanchard, A. Deville, A. Boukenter, B. Champagnon et E. Duval J. Phys. France, 47 11 (1986) 1931-1937 DOI: 10.1051/jphys:0198600470110193100