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Antiferromagnetic Transition in Ru2CrSi in Magnetic Fields
Masahiko Hiroi,Kaori Uchida,Iduru Shigeta,Masakazu Ito,Keiichi Koyama,Shojiro Kimura,Kazuo Watanabe 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
In the Heusler compound Ru2CrSi, an antiferromagnetic transition at TN =14 K was revealed byspecific heat and magnetization measurements. In this study the electrical resistivity is measured inmagnetic fields up to 14.5 T, and the antiferromagnetic transition in magnetic fields is investigated. In the temperature dependence of the resistivity at zero field, a clear dip at 15 K and a humpwith a maximum at 9 K are observed. This dip is considered to be due to the antiferromagnetictransition. With increasing magnetic field, the magnitude of the resistivity slightly increases aroundTN; i.e., a positive magnetoresistance is observed. The temperature dependence of the resistivityis hardly affected by increasing the magnetic field. The transition temperature decreases only by 0.3 K even with applying 14.5 T. These results demonstrate that the antiferromagnetic state inRu2CrSi is unusually unaffected by a strong magnetic field.
Biliary Peritonitis after Radiofrequency Ablation Diagnosed by Gadoxetic Acid-Enhanced MR Imaging
Akihiro Furuta,Hiroyoshi Isoda,Takashi Koyama,Giro Todo,Yukio Osaki,Kaori Togashi 대한영상의학회 2013 Korean Journal of Radiology Vol.14 No.6
This study describes the first case of biliary peritonitis after radiofrequency ablation diagnosed by magnetic resonance (MR) imaging with gadolinium ethoxybenzyl diethylenetriaminepentaacetic acid (Gd-EOB-DTPA), a hepatocyte-specific MR imaging contrast agent. The image acquired 300 minutes after the administration of Gd-EOB-DTPA was useful to make a definite diagnosis and to identify the pathway of bile leakage. It is important to decide on the acquisition timing with consideration of the predicted location of bile duct injury.