Why typical magnetic metals and oxides have different Curie temperatures

W. H. Qi; Z. Z. Li; L. Ma; G. D. Tang; G. H. Wu

doi:10.1063/1.5035142

AIP Advances (Jun 2018)

Why typical magnetic metals and oxides have different Curie temperatures

W. H. Qi,
Z. Z. Li,
L. Ma,
G. D. Tang,
G. H. Wu

Affiliations

W. H. Qi: Hebei Advanced Thin Film Laboratory, Department of Physics, Hebei Normal University, Shijiazhuang City 050024, People’s Republic of China
Z. Z. Li: Hebei Advanced Thin Film Laboratory, Department of Physics, Hebei Normal University, Shijiazhuang City 050024, People’s Republic of China
L. Ma: Hebei Advanced Thin Film Laboratory, Department of Physics, Hebei Normal University, Shijiazhuang City 050024, People’s Republic of China
G. D. Tang: Hebei Advanced Thin Film Laboratory, Department of Physics, Hebei Normal University, Shijiazhuang City 050024, People’s Republic of China
G. H. Wu: State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China

DOI: https://doi.org/10.1063/1.5035142
Journal volume & issue: Vol. 8, no. 6
pp. 065105 – 065105-5

Abstract

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Why do typical magnetic metals and oxides have different Curie temperatures (TC)? For example, TC = 1404, 1043, and 631 K for Co, Fe, and Ni, respectively; and TC = 860 and 369 K for spinel ferrite Fe3O4 and perovskite manganite La0.7Sr0.3MnO3, respectively. Until now, no satisfactory explanation for this magnetic ordering puzzle has been found although Weiss proposed the molecular field assumption for magnetic ordering in 1907. In this letter, we propose an explanation for this puzzle using a Weiss electron pair model based on atomic physics theory.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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