Integration of epitaxial colossal magnetoresistive films onto Si(100) using SrTiO3 as a template layer

Pradhan, A. K.; Mohanty, S.; Zhang, Kai; Dadson, J. B.; Jackson, E. M.; Hunter, D.; Rakhimov, R. R.; Loutts, G. B.; Zhang, Jun; Sellmyer, D. J.

doi:doi:10.1063/1.1842852

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Phase separation in La_5/8Sr_3/8MnO₃ (30%)+LuMnO₃ (70%) bulk sample studied by scanning microwave microscopy

Using a scanning microwave microscope (SMM), we have investigated the phase separation in a 30% La5/8Sr3/8MnO3 (LSMO)+70% LuMnO3 (LMO) polycrystalline pressed powder sample, in which the LSMO phase is a perovskite ferromagnetic metal while the LMO phase is a hexagonal ferroelectric insulator. When the electrical properties of the sample were imaged using our SMM, the sample showed a significant contrast between the metallic LSMO and the insulating LMO grains, indicating a clear phase separation...

The role of Cr substitution on the ferromagnetic properties of Ga_1−xCr_xN

Angular-dependent channeling Rutherford backscattering spectroscopy (c-RBS) has been used to quantify the fraction of Cr atoms on substitutional, interstitial, and random sites in epitaxial Ga1−xCrxN films grown by reactive molecular-beam epitaxy. The morphology of these films and correlation with their magnetic properties has been investigated. Films grown at temperatures below ∼ 750 °C have up to 90% of Cr occupying substitutional sites. Post-growth annealing at 825 °C results in a systemati...

We report on the integration of epitaxial colossal magnetoresistive La_0.67Ba_0.33MnO films on Si(100) semiconductor using SrTiO₃ template layer by pulsed-laser deposition. X-ray diffraction reveals the superior quality of the manganite film that grows epitaxially on heteroepitaxially grown SrTiO₃ template layer on Si substrate. The epitaxial films demonstrate remarkable surface morphology, magnetic transition and hysteresis, magnetoresistance, and ferromagnetic resonance, illustrating the ferromagnetic nature of the film and possible device applications at room temperature.

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KEYWORDS and PACS

Keywords

lanthanum compounds, barium compounds, strontium compounds, ferromagnetic materials, magnetic epitaxial layers, pulsed laser deposition, colossal magnetoresistance, magnetic hysteresis, magnetic transitions, surface morphology, ferromagnetic resonance, vapour phase epitaxial growth, X-ray diffraction

PACS

75.50.Dd

Nonmetallic ferromagnetic materials
81.05.Je

Ceramics and refractories (including borides, carbides, hydrides, nitrides, oxides, and silicides)
75.70.Ak

Magnetic properties of monolayers and thin films
75.60.Ej

Magnetization curves, hysteresis, Barkhausen and related effects
68.55.A-

Nucleation and growth
75.30.Kz

Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)
76.50.+g

Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance
68.55.-a

Thin film structure and morphology
75.47.Gk

Colossal magnetoresistance
81.15.Kk

Vapor phase epitaxy; growth from vapor phase
68.35.B-

Structure of clean surfaces (and surface reconstruction)
75.40.Cx

Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)
81.15.Fg

Pulsed laser ablation deposition

ARTICLE DATA

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http://dx.doi.org/10.1063/1.1842852

PUBLICATION DATA

ISSN

0003-6951 (print)

1077-3118 (online)

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American Institute of Physics

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