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Characteristic low-temperature magnetic properties of aluminous goethite [α-(Fe, Al)OOH] explained

Liu, Qingsong; Yu, Yongjae; Torrent, José; Roberts, Andrew P.; Pan, Yongxin; Zhu, Rixiang


Goethite (α-FeOOH) is an antiferromagnetic iron oxyhydroxide that forms as a weathering product of iron-bearing minerals. We systematically investigated the low- and room temperature properties of well-defined aluminous goethites [α-(Fe, Al)OOH] with varying grain size and Al content. A marked decrease in the Néel temperature with increasing Al content for goethite lowers the blocking temperature distribution, which produces an increase in the remanent magnetization on cooling. The...[Show more]

CollectionsANU Research Publications
Date published: 2006-12-16
Type: Journal article
Source: Journal of Geophysical Research 111 (2006): B12S34/1-12
DOI: 10.1029/2006JB004560


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