Impact of the radiation effect on the energy storage density and wake-up behaviors of antiferroelectric-like Al-doped HfO2 thin films.

The effect of the γ-ray total dose radiation on the energy storage density (ESD) and the phase transition of antiferroelectric-like (AFE-like) Al-doped HfO2 (HfAlO) thin films was investigated. The ESD property and wake-up behavior of the phase transition during the field cycling of the AFE-like HfAlO thin films were quantified before and after the radiation. The efficiency of the AFE-like thin films for energy storage slightly decreases as the total dose increases from 200 krad (Si) to 5 Mrad (Si), which is attributed to the radiation-induced trapped defects at the interfaces of HfAlO/TiN. Both the J-E, C-V, and εr-f characteristics of the AFE-like HfAlO thin films were also measured before and after the radiation at the same electrodes. These results further confirm that the ferroelectricity of the thin films can be reduced due to the radiation oxide trapped defects. It is worth noting that an enhanced wake-up behavior of the AFE-like HfAlO thin films can be observed after the radiation, which indicates that the transition from the antiferroelectric phase to the ferroelectric phase could be accelerated by the increased radiation-induced defects.

Effect of intraoperative heparin administration on some indices of the blood coagulatory-lytic system in the ischemic region of the small intestine with anastomosis.

Several parameters of blood coagulation-lytic system were estimated in an ischemic region of narrow intestine with anastomosis in absence of heparin therapy and after subcutaneous intraoperative heparin administration. Single heparin injection in high therapeutic doses (200 U/kg body weight) during the fi nal stage of surgery prevents not only thrombosis of mesenteric blood vessels, but to a certain extent intraperitoneal adhesions.