Investigation of heteroepitaxial growth of magnetite thin films

Sterbinsky, George E.; Cheng, Jun; Chiu, Philip; Wessels, Bruce W.; Keavney, D. J.

doi:10.1116/1.2757185

Cited by 31 publications

(32 citation statements)

References 16 publications

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“…Even though very high P values (-80 %) have been observed in epitaxial magnetite films [5], the possibility to obtain full spin polarization in this material is still disputed [4,6]. The large number of recent publications on this topic underlines the high interest in this material [5][6][7][8][9][10][11][12][13][14][15][16], but the practical achievement of (the expected) high performances in functional spintronic devices like magnetic tunnel junctions (MTJ) incorporating Fe 3 O 4 has not been reached yet [9][10][11]13].…”

Section: Introductionmentioning

confidence: 99%

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CVD synthesis of polycrystalline magnetite thin films: structural, magnetic and magnetotransport properties

Mantovan¹,

Lamperti²,

Georgieva³

et al. 2010

J. Phys. D: Appl. Phys.

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Abstract. Magnetite (Fe 3 O 4 ) is predicted to be half metallic at room temperature and it shows the highest Curie temperature among oxides. The use of Fe 3 O 4 thin films is therefore promising for spintronic devices such as magnetic tunnel junctions and magnetoresistive sensors. The structural, magnetic, and magnetotransport properties of magnetite are reported to be strongly dependent on the growth conditions. We have developed a very simple deposition chamber for growing thin magnetite films via a chemical vapor deposition process based on the Fe 3 (CO) 12 carbonyl precursor. The structural, morphological and magnetic properties of the as deposited Fe 3 O 4 films have been investigated by means of time of flight secondary ion mass spectrometry, grazing incidence X-ray diffraction, X-ray reflectivity, atomic force microscopy, conversion electron Mössbauer spectroscopy, and superconducting quantum interference device magnetometry. Magnetotransport measurements show magnetoresistance up to -2.4% at room temperature at the maximum applied field of 1.1 T.Resistivity measurements in the 100-300 K temperature range reveal that the magnetotransport properties of the Fe 3 O 4 films are governed by inter-granular tunneling of the spin polarized electrons.The spin polarization is estimated to be around -16%. A possible route for increasing the spinpolarized performances of our magnetite films is proposed. We have also deposited Fe 3 O 4 /MgO/Co stacks by using a combined chemical vapor-and atomic layer-deposition process. The trilayer's hysteresis curve evidences the presence of two distinct switching fields making it promising for magnetite-based magnetic tunnel junction applications.

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Section: Introductionmentioning

confidence: 99%

“…Thin Fe 3 O 4 films are mainly produced by pulsed laser deposition [10][11][12][13], magnetron sputtering [7-9, 14, 15], and molecular beam epitaxy [16]. We propose a simple and cost-effective method for growing magnetite thin films based on a chemical vapour deposition (CVD) process [17].…”

Section: Introductionmentioning

confidence: 99%

CVD synthesis of polycrystalline magnetite thin films: structural, magnetic and magnetotransport properties

Mantovan¹,

Lamperti²,

Georgieva³

et al. 2010

J. Phys. D: Appl. Phys.

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“…14,15,16,17,18,19 There are quite a few works on NiO/Fe 3 O 4 bilayers and multilayers, mostly grown on MgO, investigating the structural properties of the heterostructures and the nature of exchange interaction between magnetite and (the antiferromagnetic) nickel oxide. 13,20,21,22 Thin magnetite films grown on SrTiO 3 (001) allow tuning the conductivity via Nb-doping, which is of interest for some important applications.…”

Section: Introductionmentioning

confidence: 99%

Electronic and magnetic structure of epitaxialFe3O4(001)/NiOheterostructures grown on MgO(001) and Nb-doped<

et al. 2016

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“…The lattice mismatch between the inverse spinel structure of magnetite (a Fe 3 O 4 ¼ 0:8396 nm) is only 0.3% concerning the doubled MgO lattice constant (a MgO ¼ 0.4212 nm, rock salt structure). Several preparation methods such as pulsed laser deposition, 10 sputter deposition, 11,12 and reactive molecular beam epitaxy (RMBE) [13][14][15][16][17][18] have been used to grow magnetite on MgO(001).…”

mentioning

confidence: 99%

Modifying magnetic properties of ultra-thin magnetite films by growth on Fe pre-covered MgO(001)

Schemme

Krampf

Bertram³

et al. 2015

Journal of Applied Physics

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Iron oxide films were reactively grown on iron buffer films, which were deposited before on MgO(001) substrates to analyze the influence of the initial iron buffer layers on the magnetic properties of the magnetite films. X-ray photoelectron spectroscopy and low energy electron diffraction showed that magnetite films of high crystalline quality in the surface near region were formed by this two-step deposition procedure. The underlying iron film, however, was completely oxidized as proved by x-ray reflectometry and diffraction. The structural bulk quality of the iron oxide film is poor compared to magnetite films directly grown on MgO(001). Although the iron film was completely oxidized, we found drastically modified magnetic properties for these films using the magnetooptic Kerr effect. The magnetite films had strongly increased coercive fields, and their magnetic in-plane anisotropy is in-plane rotated by 458 compared to magnetite films formed directly by one step reactive growth on MgO(001). V C 2015 AIP Publishing LLC.

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Investigation of heteroepitaxial growth of magnetite thin films

Cited by 31 publications

References 16 publications

CVD synthesis of polycrystalline magnetite thin films: structural, magnetic and magnetotransport properties

CVD synthesis of polycrystalline magnetite thin films: structural, magnetic and magnetotransport properties

Electronic and magnetic structure of epitaxialFe3O4(001)/NiOheterostructures grown on MgO(001) and Nb-doped<

Modifying magnetic properties of ultra-thin magnetite films by growth on Fe pre-covered MgO(001)

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