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Suber L, Imperatori P, Mari A, et al. Thermal hysteresis of Morin transition in hematite particles. Phys Chem Chem Phys. 2010;12(26):6984-9doi: 10.1039/b925371h.
Suber, L., Imperatori, P., Mari, A., Marchegiani, G., Mansilla, M. V., Fiorani, D., Plunkett, W. R., Rinaldi, D., Cannas, C., Ennas, G., & Peddis, D. (2010). Thermal hysteresis of Morin transition in hematite particles. Physical chemistry chemical physics : PCCP, 12(26), 6984-9. https://doi.org/10.1039/b925371h
Suber, L, et al. "Thermal hysteresis of Morin transition in hematite particles." Physical chemistry chemical physics : PCCP vol. 12,26 (2010): 6984-9. doi: https://doi.org/10.1039/b925371h
Suber L, Imperatori P, Mari A, Marchegiani G, Mansilla MV, Fiorani D, Plunkett WR, Rinaldi D, Cannas C, Ennas G, Peddis D. Thermal hysteresis of Morin transition in hematite particles. Phys Chem Chem Phys. 2010 Jul 14;12(26):6984-9. doi: 10.1039/b925371h. Epub 2010 May 18. PMID: 20485727.
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Phys Chem Chem Phys. 2010 Jul 14;12(26):6984-9. doi: 10.1039/b925371h. Epub 2010 May 18.

Thermal hysteresis of Morin transition in hematite particles.

Physical chemistry chemical physics : PCCP

L Suber, P Imperatori, A Mari, G Marchegiani, M Vasquez Mansilla, D Fiorani, W R Plunkett, D Rinaldi, C Cannas, G Ennas, D Peddis

Affiliations

  1. CNR-Istituto di Struttura della Materia, via, Salaria km 29,300,00016 Monterotondo St, Roma, Italy. [email protected]

PMID: 20485727 DOI: 10.1039/b925371h

Abstract

Rhombohedral shaped, single crystal hematite particles with narrow size distribution (D(TEM) = 93 +/- 2 nm) were prepared by hydrolysis of iron chloride and polymerisation in water. The results of field dependent magnetization measurements at different warming-cooling rates and ac susceptibility measurements at varying frequencies are reported and discussed. Thermal hysteresis (DeltaT(M)) associated with the Morin transition and field dependence of the Morin temperature (T(M)) are observed in warming-cooling cycles (DeltaT(M) = 25 and 13 K for H = 0.1 and 3 T, respectively) due to the first order phase transition. A frequency dependence of ac susceptibility is observed above T(M), as a result of the relaxation of the magnetic moment of hematite particles in the weak-ferromagnetic phase.

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