Chunmu Feng

(La1-xBax)(Zn1-xMnx)AsO: A two-dimensional 1111-type diluted magnetic semiconductor in bulk form

We report the synthesis and characterization of a bulk diluted magnetic semiconductor (La1-xBax)(Zn1-xMnx)AsO (0 <= x <= 0.2) with a layered crystal structure identical to that of the 1111 FeAs superconductors. No ferromagnetic order occurs for (Zn,Mn) substitution in the parent compound LaZnAsO without charge doping. Together with carrier doping via (La,Ba) sub- stitution, a small amount of Mn substituting for Zn results in ferromagnetic order with TC up to ~40 K, although the system remains semiconducting. Muon spin relaxation measurements confirm the development of ferromagnetic order in the entire volume, with the relationship between the internal field and TC consistent with the trend found in (Ga,Mn)As, the 111 Li(Zn,Mn)As, and the 122 (Ba,K)(Zn,Mn)2As2 systems.We employ NMR techniques to investigate the nature of Mn spins in the I-II-V diluted magnetic semiconductor Li(Zn1−xMnx)P (x = 0.1, Curie temperature Tc = 25 K). We successfully identify the Li NMR signals arising from the Li sites adjacent to Mn, and probe the static and dynamic properties of Mn spins. From the NMR spin-lattice relaxation data, we show that the Mn spin-spin interactions extend over many unit cells.

Growth behavior and surface morphology of Ag rough thin films deposited on silicone oil surfaces

The growth behavior and surface morphology of a rough film system, deposited on silicone oil drop surfaces by a r.f. magnetron sputtering method, have been studied. An anomalous film growth relaxation is observed during the deposition process. The relaxation rate is extremely sensitive to the substrate temperature. The surface morphology at the micrometer length scale is very susceptible to the substrate temperature, the incident r.f. capacity, and the nature of the solid substrate on which the oil drop is dripped. A discussion on the physical origins of these phenomena is also presented.

Variation of the metal-insulator transition and formation of bipolarons by Cd doping in the thiospinel system Cu 1 − x Cd x Ir 2 S 4

The pseudo-binary thiospinel system Cu

Competing magnetic fluctuations in Sr 3 Ru 2 O 7 probed by Ti doping

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Competing magnetic fluctuations inSr3Ru2O7probed by Ti doping

Cd

Competing magnetic fluctuations in Sr3 Ru2 O7 probed by Ti doping

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Semiconductor-Like Properties of Sputtered FexCu1-x Thin Films

Ir

Critical behavior of a metallic diffuse-fringe film percolation system

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STRUCTURAL AND ELECTRICAL PROPERTIES OF A METALLIC ROUGH-THIN-FILM SYSTEM DEPOSITED ON LIQUID SUBSTRATES

S

Variation of the metal-insulator transition and formation of bipolarons by Cd doping in the thiospinel systemCu1−xCdxIr2S4

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