Phys. Rev. Lett. 92, 217201 (2004) [4 pages]Thermoinduced Magnetization in Nanoparticles of Antiferromagnetic Materials
We show that there is a thermoinduced contribution to the magnetic moment of nanoparticles of antiferromagnetic materials. It arises from thermal excitations of the uniform spin-precession mode, and it has the unusual property that its magnitude increases with increasing temperature. This has the consequence that antiferromagnetism is nonexistent in nanoparticles at finite temperatures and it explains magnetic anomalies, which recently have been reported in a number of studies of nanoparticles of antiferromagnetic materials. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.217201
DOI:
10.1103/PhysRevLett.92.217201
PACS:
75.50.Ee, 75.75.+a, 76.50.+g
See AlsoReply: N. J. Silva, L. D. Carlos, and V. S. Amaral, Comment on “Thermoinduced Magnetization in Nanoparticles of Antiferromagnetic Materials”, Phys. Rev. Lett. 94, 039707 (2005). Reply: Steen Mørup and Cathrine Frandsen, Mørup and Frandsen Reply:, Phys. Rev. Lett. 94, 039708 (2005). Reply: A. H. MacDonald and C. M. Canali, Comment on “Thermoinduced Magnetization in Nanoparticles of Antiferromagnetic Materials”, Phys. Rev. Lett. 94, 089701 (2005). Reply: Steen Mørup and Cathrine Frandsen, Mørup and Frandsen Reply:, Phys. Rev. Lett. 94, 089702 (2005). |
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