Paul C. Snijders

Room-Temperature Multiferroic Hexagonal LuFeO3 Films

The crystal and magnetic structures of single-crystalline hexagonal LuFeO(3) films have been studied using x-ray, electron, and neutron diffraction methods. The polar structure of these films are found to persist up to 1050 K; and the switchability of the polar behavior is observed at room temperature, indicating ferroelectricity. An antiferromagnetic order was shown to occur below 440 K, followed by a spin reorientation resulting in a weak ferromagnetic order below 130 K. This observation of coexisting multiple ferroic orders demonstrates that hexagonal LuFeO(3) films are room-temperature multiferroics.

Growth Diagram and Magnetic Properties of Hexagonal LuFe2O4 Thin Films

A growth diagram of Lu-Fe-O compounds on an MgO (111) substrate using pulsed laser deposition is constructed according to the experimental data. The LuFe2O4 phase can only be grown in a small range of temperature and O2 pressure conditions. Fundamental understanding of the growth mechanism of Lu-Fe-O compound films are gained in terms of the thermal chemistry at the surface. Superparamagnetism is observed in a film of LuFe2O4 clusters separated by the hexagonal LuFeO3 phase and structural defects.

Spectroscopic evidence for spin-polarized edge states in graphitic Si nanowires

The stepped Si(553)-Au surface undergoes a

Chemically induced Jahn–Teller ordering on manganite surfaces

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Silicon spin chains at finite temperature: Dynamics of Si(553)-Au

reconstruction at low temperature which has recently been interpreted theoretically as the

Atomically flat reconstructed rutile TiO2(001) surfaces for oxide film growth

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