青岛科技大学主页平台管理系统 chenkezheng--Home-- Magnetic dead layer is not "magnetically dead" in hematite nanocubes

陈克正

Professor

Supervisor of Doctorate Candidates

Supervisor of Master's Candidates

Date of Birth:1965-10-27

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Magnetic dead layer is not "magnetically dead" in hematite nanocubes

Release time:2021-03-15 Hits:

Key Words:Hematite; Magnetic dead layer; Surface; Magnetic activity; Paramagnetic

Abstract:The presence of magnetic dead layer is usually supposed to cause a degradation of magnetism due to highly frustrated spin configurations. In this Letter, we report a diametrically opposite experimental and theoretical investigation as to hematite nanocubes, in which the magnetic dead layer, calculated to be 3.2 nm-thick in average as for 25 nm-sized cubes, is found to be of high magnetic activity and hence dominating many of the cubes' magnetic features, including paramagnetic attribute of thermo-magnetic curves, good reversibility of high-field magnetization and obvious exchange bias effect in zero-field cooled procedure at low temperatures. (C) 2013 Elsevier B.V. All rights reserved.

Volume:377

Issue:34-36

Translation or Not:no

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