High static magnetic field-assisted synthesis of Mn-doped ZnO diluted magnetic semiconductor via the hydrothermal method

ABSTRACT

The magnetic field-assisted approach had been applied in the synthesis of Mn-doped ZnO diluted magnetic semiconductor via the hydrothermal method. The effect of high static magnetic field (HSMF) on the structures, morphologies and magnetic properties of the samples were characterised. X-ray diffraction and X-ray photoelectron analysis revealed that Mn ions had been doped in the hexagonal wurtzite ZnO and there were no any other detectable phases observed. Energy dispersive spectroscopy revealed that the content ratio of Zn to Mn was about 19:1. In addition, transmission electron microscopy and high-resolution transmission electron microscopy studies confirmed that Zn_0.95Mn_0.05O was nanorods in shape, and the growth rate of the nanorod was obviously restrained. While more oxygen vacancies (V_O) had been introduced with increasing the magnetic flux density. Finally, magnetisation measurements implied that all of the Zn_0.95Mn_0.05O samples were room-temperature ferromagnetism and their magnetism was improved by the HSMF.

KEYWORDS:

• High static magnetic field
• Zn_0.95Mn_0.05O nanorods
• oxygen vacancies (V_O)
• room-temperature ferromagnetic
• magnetic damping force

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The authors gratefully acknowledge the financial support of National Natural Science Foundation of China [grant number U1732276], [grant number U1860202], [grant number 51704193], [grant number 50134010], Science and Technology Commission of Shanghai Municipality [grant number 15520711000], Changjiang Scholars Program of China.