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A ferromagnetic oxide featuring copper as the sole transition metal would be very weird. I'm not aware of any examples of the copper block demonstrating ferroma
by scythe 3y ago
A ferromagnetic oxide featuring copper as the sole transition metal would be very weird. I'm not aware of any examples of the copper block demonstrating ferromagnetism without a more "conventional" ferromagnetic transition metal (from Cr to Ni and cousins).
But ferromagnetism has been demonstrated in black phosphorus:
https://www.sciencedirect.com/science/article/pii/S0038109818303983 https://www.sciencedirect.com/science/article/pii/S003810981...
So the most likely explanation for the observation here is that the sample contains black phosphorus. But do all the samples contain black phosphorus?
- 46Bit 3y ago(Not a scientist, just a hobbyist.) Red phosphorous is an ingredient in the original paper’s process. https://patents.google.com/patent/US6110438A/en https://patents.google.com/patent/US6110438A/en claims that black phosphorous can be made from red phosphorus using a vacuum and hundreds-of-C temperatures. Both of which people have done. Seems very possible.