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Magnetic Properties of Mn2Sb1−xGex (0.05 ≤ x ≤ 0.2) in High Magnetic Fields
Daisuke Shimada,Hiroki Orihashi,Daisuke Mitsunaga,Masakazu Ito,Masahiko Hiroi,Keiichi Koyama,Reisho Onodera,Kohki Takahashi,Kazuyuki Matsubayashi,Yoshiya Uwatoko 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
Magnetization and electrical resistivity measurements were carried out for polycrystallineMn2Sb1−xGex (0.05 ≤ x ≤ 0.2) in magnetic fields up to 16 T in the 4.2 - 600 K temperaturerange in order to investigate the magnetic and the electrical properties under high magnetic fields. Mn2Sb0.92Ge0.08 showed a Curie temperature, TC, of 532 K and a first order magnetic transitionfrom a ferrimagnetic (FRI) to an antiferromagnetic (AFM) phase at Tt = 230 K with decreasingtemperature in a zero magnetic field. With increasing x, TC decreased and Tt increased. ForMn2Sb0.92Ge0.08, a matamagnetic transition from an AFM to a FRI phase was observed at 215 K. The magnetic phase diagram of Mn2Sb1−xGex is presented.
Suzuki Yugo,Ochiai Yorinari,Hosoi Atsuko,Okamura Takayuki,Hayasaka Junnosuke,Mitsunaga Yutaka,Tanaka Masami,Odagiri Hiroyuki,Nomura Kosuke,Yamashita Satoshi,Matsui Akira,Kikuchi Daisuke,Ohashi Kenichi 거트앤리버 소화기연관학회협의회 2024 Gut and Liver Vol.18 No.1
Background/Aims: Asymptomatic esophageal eosinophilia (aEE) is considered to be a potential precursor of eosinophilic esophagitis (EoE). However, there are few clinical parameters that can be used to evaluate the disease. Therefore, we aimed to clarify the factors involved in the symptoms of EoE by examining the clinicopathological differences between aEE and EoE. Methods: We reviewed 41 patients with esophageal eosinophilia who underwent endoscopic ultrasonography and high-resolution manometry. They were divided into the aEE group (n=16) and the EoE group (n=25) using the Frequency Scale for the Symptoms of Gastroesophageal Reflux Disease score. The patients’ clinicopathological findings were collected and examined. Results: The median Frequency Scale for the Symptoms of Gastroesophageal Reflux Disease score was 3.0 in the aEE group and 10.0 in the EoE group. There was no significant difference in patient characteristics, endoscopic findings and pathological findings. The cutoff value for wall thickening was 3.13 mm for the total esophageal wall thickness and 2.30 mm for the thickness from the surface to the muscular layer (total esophageal wall thickness: 84.0% sensitivity, 75.0% specificity; thickness from the surface to the muscular layer: 84.0% sensitivity, 68.7% specificity). The high-resolution manometry study was abnormal in seven patients (43.8%) in the aEE group and in 12 (48.0%) in the EoE group. The contractile front velocity was slower in the EoE group (p=0.026). Conclusions: The esophageal wall thickening in the lower portion of the esophagus is an important clinical factors related to the symptoms in patients with EoE.