Room temperature ferromagnetism has been observed in Mn-doped ZnO thin films using radio frequency magnetron sputtering. X-ray diffraction measurements show that the samples possess wurtize structures without secondary phases. Magnetization loops for Mn-doped ZnO thin film which deposited at 300 °C and annealed in O 2 atmosphere at 500 °C were measured at 300 K and show ferromagnetic behaviour. In our study, the result shows that it is the substitutional Mn 2+ ions that make the ferromagnetic ordering in Mn doped ZnO thin films. Ferromagentic ordering becomes weaker at higher concentration of oxygen vacancy.

Stricture of the celiac artery caused by the median arcuate ligament induces abdominal ischemic symptoms and aneurysm near the pancreatic head. However, the need to treat asymptomatic patients is unclear. We safely performed surgical decompression of a stricture of the celiac artery by MAL in an asymptomatic patient at the same time as gastrectomy for gastric cancer. After surgery, the stricture of the celiac artery had disappeared as demonstrated by CT scan and 3-D CT angiography.

No abstract

No abstract