Low-Temperature Magnetic Properties of Hematite Nanorods
Source abstract
Abstract
Low-temperature magnetic properties of hematite nanorods, prepared by both iron−water vapor reactions (sample 1) and hydrothermal methods (sample 2), were studied by superconducting quantum interference device (SQUID) magnetometry. The Morin transition temperature was found to be 122 K in hematite nanorod sample 1, and an unexpected phenomenon was found under an applied field of 10 Oe. These nanorods (sample 1) show an abrupt decrease of the magnetic susceptibility at ca. 122 K, contrary to the abrupt increase normally attributed to the Morin transition in bulk hematite. The origin of this phenomenon can be traced to the probable coherence of the one-dimensional shape anisotropy with the magnetocrystalline anisotropy. In contrast, no obvious Morin transition was found in hematite nanorod sample 2.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Iron oxide chemistry and applications · Minerals Flotation and Separation Techniques · Magnetic Properties and Synthesis of Ferrites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
The Schools of Mechanical, Materials and Manufacturing Engineering and of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD, and WestCHEM, Department of Chemistry, Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, United Kingdom
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