Changes in Right Ventricular Structure and Function Assessed Using Cardiac Magnetic Resonance Imaging in Bosentan-Treated Patients With Pulmonary Arterial Hypertension

详细信息	查看全文 | 推荐本文 |

• 作者：Kelly M. Chin ; Martha Kingman ; James A. de Lemos ; John J. Warner ; Sharon Reimold ; Ron Peshock ; Fern ; o Torres
• 关键词：Ce₁Y₂Fe₅O₁₂ thin films ; Magnetic properties ; GGG ; SiO₂/Si substrates
• 刊名：The American Journal of Cardiology
• 出版年：2008
• 期刊代码：5_00029149
• 类别：med
• 出版时间：1 June 2008
• 卷：101
• 期：11
• 页码：1669-1672
• 文件大小：124 K

摘要

Microstructure and magnetic properties of crystalline Ce₁Y₂Fe₅O₁₂ thin films prepared on GGG and on SiO₂/Si substrates by pulsed laser deposition were studied. The results show that highly textured Ce₁Y₂Fe₅O₁₂ film with (4 4 4) preferred orientation prepared on GGG (1 1 1) shows strong paramagnetism superimposed by a weak ferromagnetism. However, polycrystalline Ce₁Y₂Fe₅O₁₂ thin films on SiO₂/Si, which can only be obtained after post-annealing, show strong ferromagnetism with easy axis of magnetization lying in the plane of the film. With post-annealing temperature increasing, CeO₂ segregates from Ce₁Y₂Fe₅O₁₂; then YIG continues to be decomposed, forming Fe₂O₃. Consequently, the saturation magnetization of Ce₁Y₂Fe₅O₁₂ films decreases first and then increases correspondingly, which indicates that the magnetic properties of Ce₁Y₂Fe₅O₁₂ films are mainly related to the microstructure.