'In-situ' solution processed room temperature ferromagnetic MgO thin films printed by inkjet technique

• We report on 'in-situ' solution processed homogeneous (200) oriented MgO ∼85nm thin films deposited on Si substrates by inkjet printing. These films are found to show ferromagnetic order beyond room temperature with a saturation magnetization MS as high as ∼0.63 emu/g. X-ray photoelectron spectroscopy investigations show the absence of any possible contamination effects, while the Mg 2p, and O 1s spectra indicate that the role of defect structure at the Mg site is important in the observed magnetism. By controlling the pH values of the precursors the concentration of the defects can be varied and hence tune the magnetization at room temperature. The origin of magnetism in these MgO thin films appears to arise from the cation vacancies.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering (hsv//eng)

Nyckelord

Cation vacancies

Ferromagnetic orders

In-situ

Ink-jet technique

MgO thin films

pH value

Room temperature

Si substrates

Solution-processed

Defects

Ferromagnetic materials

Ferromagnetism

Oxide films

Photoelectron spectroscopy

Semiconducting silicon compounds

Thin films

X ray photoelectron spectroscopy

Saturation magnetization

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