Nanoscale-driven single-domain structure in nickel substituted superparamagnetic cobalt ferrites

Abstract Epitaxial growths of NiO thin films were realized on (0001) sapphire and (100) MgO substrates by using a reactive RF magnetron sputtering method. The NiO epilayers grown on a (0001) sapphire exhibited the (111)-oriented double-domain structure, which comprised of a triangular and its inverted triangular grains. Meanwhile, the NiO epilayers on a (100) MgO exhibited the (100)-oriented single-domain structure, which comprised of quadrangular grains. The observed grain structures most likely reflect the growth planes of respective NiO epilayers, and, mixed crystals of NiO and MgO were present near the interface. Therefore, A (100) MgO substrate is suitable for obtaining a single-domain NiO epilayer, whereas a (0001) sapphire substrate is suitable for obtaining a NiO epilayer without interdiffusion between NiO and sapphire. These NiO epilayers will be expected for applying the physical properties evaluation using photoluminescence or Hall measurements, and the fabrication of electrical or optical devices.

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Strain-domain structure and stability diagrams for single-domain magnetic thin films

Applied Physics Letters ◽

10.1063/1.4824165 ◽

2013 ◽

Vol 103 (14) ◽

pp. 142413 ◽

Cited By ~ 13

Author(s):

J. J. Wang ◽

Jia-Mian Hu ◽

Long-Qing Chen ◽

Ce-Wen Nan

Keyword(s):

Thin Films ◽

Domain Structure ◽

Magnetic Thin Films ◽

Single Domain ◽

Structure And Stability ◽

Stability Diagrams

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Morphology and Domain Structure of Unsupported PbTiO3Thin Films Prepared by Sol-Gel Process

MRS Proceedings ◽

10.1557/proc-403-585 ◽

1995 ◽

Vol 403 ◽

Author(s):

C. J. Lu ◽

S. B. Ren ◽

H. M. Shen ◽

Y. N. Wang

Keyword(s):

Thin Films ◽

Grain Size ◽

Domain Structure ◽

Domain Walls ◽

Sol Gel ◽

Single Domain ◽

Annealing Temperatures ◽

Sol Gel Process ◽

Size And Morphology ◽

Almost All

AbstractThe morphology and domain structure of unsupported PbTiO3thin films with fine grains (>200 nm) were investigated by TEM technique. The unsupported PbTiO3thin films were successfully prepared by sol-gel process onto NaCI substrates and followed by dissolving away the substrates. Electron diffiraction patterns showed that the unsupported PbTiO3thin films had slight <110> preferred orientation perpendicular to the film surfaces. Grain size and morphology vary significantly with the thickness of the films or the annealing temperatures. Even though the grain size is rather small (40–180 nm), the domains are clearly visible. Most of the grains show single domain, while some irregular and curved domain walls appear only in a small portion of the fine grains. The number of single-domained grains increases with decreasing grain size. Almost all domain walls observed are 90° walls.

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ANALYSIS OF THE (3 × 3)-H/Cu(111) SYSTEM USING EIKONAL-LEVEL HELIUM ATOM SCATTERING SIMULATIONS

Surface Review and Letters ◽

10.1142/s0218625x07010810 ◽

2007 ◽

Vol 14 (06) ◽

pp. 1089-1093 ◽

Cited By ~ 2

Author(s):

I. G. SHUTTLEWORTH

Keyword(s):

Domain Structure ◽

Helium Atom ◽

Eikonal Approximation ◽

Single Domain ◽

Helium Atom Scattering ◽

Adsorption Sites ◽

Atom Scattering

The saturated (3 × 3)- H / Cu (111) system has been investigated by Eikonal-level helium atom scattering (HAS) simulations of previously reported HAS diffraction images. Basing the investigation on an unreconstructed single-domain structure with H atoms occupying three-fold hollow adsorption sites, a systematic trial of all possible structures has been performed and a series of structures has been shown to agree with the experimental images. Comparison of this fitting process to diffraction images taken at low (30°) and high (47°) angles of incidence has shown that the Eikonal approximation is a reasonable scattering algorithm for the H / Cu (111) system.

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