Oxygen pressure-tuned epitaxy and magnetic properties of magnetite thin films. / Liu, Wenqing.

In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, Vol. 432, 15.06.2017, p. 472–476.

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Oxygen pressure-tuned epitaxy and magnetic properties of magnetite thin films. / Liu, Wenqing.

In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, Vol. 432, 15.06.2017, p. 472–476.

Research output: Contribution to journalLetterpeer-review

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Liu, Wenqing. / Oxygen pressure-tuned epitaxy and magnetic properties of magnetite thin films. In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. 2017 ; Vol. 432. pp. 472–476.

BibTeX

@article{0dea752d33f845d6895f0b8bf173a8eb,
title = "Oxygen pressure-tuned epitaxy and magnetic properties of magnetite thin films",
abstract = "Quasi-two-dimensional magnetite epitaxial thin films have been synthesized by pulsed laser deposition technique at various oxygen pressures. The saturation magnetizations of the magnetite films were found to decrease from 425 emu/cm3, which is close to the bulk value, to 175 emu/cm3 as the growth atmospheres varying from high vacuum (∼1 × 10−8 mbar) to oxygen pressure of 1 × 10−3 mbar. The ratio of the Fe3+ to Fe2+ increases from 2 to 2.7 as oxygen pressure increasing shown by XPS fitting, which weakens the net magnetic moment generated by Fe2+ at octahedral sites as the spins of the Fe3+ ions at octahedral and tetrahedral sites are aligned in antiparallel. The results offer direct experimental evidence of the influence to the Fe3+/Fe2+ ratio and the magnetic moment in magnetite epitaxy films by oxygen pressure, which is significant for spintronic applications.",
author = "Wenqing Liu",
year = "2017",
month = jun,
day = "15",
doi = "10.1016/j.jmmm.2017.02.032",
language = "English",
volume = "432",
pages = "472–476",
journal = "JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS",
issn = "0304-8853",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Oxygen pressure-tuned epitaxy and magnetic properties of magnetite thin films

AU - Liu, Wenqing

PY - 2017/6/15

Y1 - 2017/6/15

N2 - Quasi-two-dimensional magnetite epitaxial thin films have been synthesized by pulsed laser deposition technique at various oxygen pressures. The saturation magnetizations of the magnetite films were found to decrease from 425 emu/cm3, which is close to the bulk value, to 175 emu/cm3 as the growth atmospheres varying from high vacuum (∼1 × 10−8 mbar) to oxygen pressure of 1 × 10−3 mbar. The ratio of the Fe3+ to Fe2+ increases from 2 to 2.7 as oxygen pressure increasing shown by XPS fitting, which weakens the net magnetic moment generated by Fe2+ at octahedral sites as the spins of the Fe3+ ions at octahedral and tetrahedral sites are aligned in antiparallel. The results offer direct experimental evidence of the influence to the Fe3+/Fe2+ ratio and the magnetic moment in magnetite epitaxy films by oxygen pressure, which is significant for spintronic applications.

AB - Quasi-two-dimensional magnetite epitaxial thin films have been synthesized by pulsed laser deposition technique at various oxygen pressures. The saturation magnetizations of the magnetite films were found to decrease from 425 emu/cm3, which is close to the bulk value, to 175 emu/cm3 as the growth atmospheres varying from high vacuum (∼1 × 10−8 mbar) to oxygen pressure of 1 × 10−3 mbar. The ratio of the Fe3+ to Fe2+ increases from 2 to 2.7 as oxygen pressure increasing shown by XPS fitting, which weakens the net magnetic moment generated by Fe2+ at octahedral sites as the spins of the Fe3+ ions at octahedral and tetrahedral sites are aligned in antiparallel. The results offer direct experimental evidence of the influence to the Fe3+/Fe2+ ratio and the magnetic moment in magnetite epitaxy films by oxygen pressure, which is significant for spintronic applications.

U2 - 10.1016/j.jmmm.2017.02.032

DO - 10.1016/j.jmmm.2017.02.032

M3 - Letter

VL - 432

SP - 472

EP - 476

JO - JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

JF - JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

SN - 0304-8853

ER -