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Electronic structure and evolution of the orbital state in metallicCa2−xSrxRuO4
Noh, Han-Jin,Oh, S.-J.,Park, B.-G.,Park, J.-H.,Kim, J.-Y.,Kim, H.-D.,Mizokawa, T.,Tjeng, L. H.,Lin, H.-J.,Chen, C. T.,Schuppler, S.,Nakatsuji, S.,Fukazawa, H.,Maeno, Y. American Physical Society 2005 Physical review. B, Condensed matter and materials Vol.72 No.5
Magnetic Order Induced by Fe Doping in the Intermediate Valence System β-YbAlB4
K. Kuga,S. Nakatsuji 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
We have succeeded in doping Fe at the Al site in the intermediate valence and quantum criticalmaterial β-YbAlB4 up to 6%. Our measurements of the magnetization and the specific heat for-YbAl0.94Fe0.06B4 show magnetic ordering at 10 K. The antiferromagnetic Weiss temperature of88 K, which is smaller than the 110 K for β-YbAlB4, indicates that Fe doping suppresses the Kondotemperature and induces magnetism, driving the system away from the quantum critical point.
Y. H. Matsuda,T. Nakamura,K. Kuga,S. Nakatsuji,S. Michimura,T. Inami,N. Kawamura,M. Mizumaki 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
The valence state of Yb ions in β-YbAlB4 and its polymorph α-YbAlB4 has been investigated byusing X-ray absorption and emission spectroscopy in SPring-8 at temperatures from 2 to 280 K. Theobserved Yb valence is 2.78 ± 0.01 in β-YbAlB4 at 2 K by using the X-ray emission spectroscopy. The valence is found to gradually increase with increasing temperature toward the trivalent state,and the characteristic temperature of the valence fluctuation is expected to be about 290 K. Wealso found a small increase in the Yb valence ( 0.002) by applying a magnetic field of 32 T at40 K to β-YbAlB4.
Kobayashi, Y.,Sato, M.,Taguchi, H.,Koike, S.,Nakatsuji, H.,Tanaka, K. Asian Australasian Association of Animal Productio 2004 Animal Bioscience Vol.17 No.3
Seventy-six animals including cattle, sheep, horses, 6 species of zoo animals were employed for collection of fresh feces in order to detect verotoxigenic Esherichia coli (VTEC) by safe, quick and sensitive PCR-based molecular methods. Bacterial cell disruption with bead-beating followed by bacterial DNA purification with hydroxyapatide chromatography and gel filtration allowed DNA preparation from animal feces with high recovery and purity. A mountain goat was firstly shown by PCR and sequencing to shed verotoxin 2 gene (vt2) that was used to generate vt2 probe and second primer set for nested PCR to attempt more sensitive detection. Most sensitive nested PCR revealed that 45% of tested cattle and 47% of tested zoo animals were VTEC-positive, while least sensitive normal PCR detected VTEC from none of these animals except a mountain goat. Moderately sensitive detection by PCR in combination with hybridization suggested that the VTEC density varied between the VTEC-positive cattle.