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Photoluminescence and Room Temperature Ferromagnetism Regulation of Cuo:Ho Terrace Structural Dilute Magnetic Semiconductor Materials

SSRN, ISSN: 1556-5068
2024
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Article Description

Gas-liquid phase chemical deposition and a subsequent heat treatment method are developed to synthsis crystal CuO and CuO:Ho terrace structures. CuO terrace structures display weak ferromagnetic behavior owing to its unqiue crystal structure. The ferromagnetism of CuO:Ho terrace structures are significantly enhanced comparing to the crystal CuO and the values of the saturation magnetization presents a parabolic trend with the increase of Ho ions doping concentrations. The magnetism of the crystal CuO:Ho terrace structures is mainly derived from the magnetic moment provided by Ho ions doping. The ferromagnetism as observed from the zero-field-cooling and field-cooling curves of CuO:Ho (x= 0.88%) has been further discussed. The first-principles calculations based on the density functional theory has been used to investigate the origin of ferromagnetism of the CuO:Ho terrace structures. The result of spin polarization density of states (DOS) and spatial distribution of the spin density show that the origin of the ferromagnetism for CuO:Ho crystal is mainly attribute to the exchange interactions among the O 1s, Cu 2p and Ho 4f orbits. This CuO:Ho terrace structures may be a desired material for the use in spintronics due to the strong ferromagnetic coupling between the f-electrons related spin polarized states and the carriers.

Bibliographic Details

Mingyan Chuai; Zichu Zhang; Zhen Sun

Elsevier BV

Multidisciplinary; Dilute magnetic semiconductor; CuO:Ho; Terrace structure; Photoluminescence; Room temperature ferromagnetism

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