Stable Magnetic Remanence in Antiferromagnetic Goethite

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Science  10 Nov 1967:
Vol. 158, Issue 3802, pp. 785-787
DOI: 10.1126/science.158.3802.785


Goethite, known to be antiferromagnetic, acquires thermoremanent magnetization at its Neel temperature of 120°C. This remanence, extremely stable, is due to the presence of unbalanced spins in the antiferromagnetic structure; the spins may result from grain size, imperfections, or impurities.