Spin-transfer switching and thermal stability in an FePt/Au/FePt nanopillar prepared by alternate monatomic layer deposition

We fabricated a current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) nanopillar with a 1-nm-thick FePt free layer having perpendicular anisotropy using the alternate monatomic layer deposition method. Nanopillars consisting of [Fe (1 monolayer (ML))/Pt (1 ML)]n (n: the number of the alternation period) ferromagnetic layers and an Au spacer layer showed spin-transfer induced switching at room temperature.Comment: 11 page

Platelet Activation in Patients After Splenectomy with Total Gastrectomy for Gastric Cancer

We investigated change in platelet activation using flow cytometry in patients before and after splenectomy with total gastrectomy for gastric cancer. Methods: Six patients who underwent splenectomy for lymphadenectomy with total gastrectomy for gastric cancer were the subjects in this study. In the patients, platelet count and platelet activation were evaluated before the operation, 1 week after the operation, and 1 month after the operation. Expression of CD62P (P-selectin) was analysed as a marker of platelet activation using flow cytometry. Results: Although platelet count significantly increased 1 week after the operation, the platelet count 1 month after the operation did not increase significantly. Expression of CD62P (P-selectin) significantly decreased at 1 week and 1 month after the operation, compared with the level before the operation. No postoperative complications occurred in any patient. Conclusion: In the present study, platelet activation did not progress after the operation. The results mean that the risk of thrombosis after splenectomy does not increase

2p resonance photoemission and Auger features in NiS2 and FeS2

Resonance behaviors of the Ni and Fe 3d, 3p and 3s related satellite photoemission and Auger features are measured for the Ni and Fe 2p core excitation in NiS2 and FeS2. Chronological interpretation is proposed to the Ni and Fe 2p3p3d Auger features. A resonance satellite around the binding energy of 30 eV is identified as due to the plasmon satellite associated with the resonance-enhanced satellite of the 3d state

Strong Fano effect in the magnetic circular dichroism of the Pt N6,7 core absorption of ferromagnetic CoPt3

We report the core photoabsorption (XAS) and magnetic circular dichroism (MCD) spectra in the Pt N6,7(4f→5d) region of the ferromagnetic CoPt3. The measured XAS spectra have shown typical Fano line shapes, and the MCD spectrum has shown very unusual features that cannot be explained within the framework of the conventional selection rule for the dipole transition. It is revealed from a theoretical analysis that the strong Fano effect is essential to interpret these MCD features. We will discuss in detail the influence of the Fano effect on the Pt N6,7 MCD line shape

Magnetic circular dichroism of the S 2p, Co 2p, and Co 3p core absorption and orbital angular momentum of the Co 3d state in low-spin CoS2

Magnetic circular dichroism (MCD) has been measured for ferromagnetic CoS2 in the S 2p, Co 2p and 3p core absorption regions. MCD in the S 2p region is discussed in terms of the exchange splitting of the unoccupied band. The Co 2p MCD has revealed that the orbital angular momentum of the Co 3d state remains finite in spite of its low-spin configuration. This situation is confirmed by a simple cluster model calculation