Comment on

• Anomalous Hall effect governed by electron doping in a room-temperature transparent ferromagnetic semiconductor.

  Toyosaki H, Fukumura T, Yamada Y, Nakajima K, Chikyow T, Hasegawa T, Koinuma H, Kawasaki M. Toyosaki H, et al. Nat Mater. 2004 Apr;3(4):221-4. doi: 10.1038/nmat1099. Epub 2004 Mar 21. Nat Mater. 2004. PMID: 15034563
• Large anomalous Hall effect in a silicon-based magnetic semiconductor.

  Manyala N, Sidis Y, DiTusa JF, Aeppli G, Young DP, Fisk Z. Manyala N, et al. Nat Mater. 2004 Apr;3(4):255-62. doi: 10.1038/nmat1103. Epub 2004 Mar 21. Nat Mater. 2004. PMID: 15034565