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ID 33111
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別タイトル
試料作製・評価による希土類化合物の研究 : 少数キャリヤー系希土類プニクタイドYB4AS3及び希土類水素化物SmH2+δを例として <学位論文要旨>
著者
Nakamura, Osamu
NDC
化学
抄録(英)
Physical properties were investigated for Yb4As3 and SmH2+δ. In the case of Yb4As3, the Sommerfeld coefficient γ = 200 mJ/(K2 mole) of Yb4As3 does not originate from impurities. The change of γ is observed when the specific heat is measured in a magnetic field of 1 T. The Korringa law (T1T=constant) holds only in the narrow temperature range between 20 K and 10 K. Their physical properties of Yb4As3 cannot be described by a simple Fermi liquid picture. In the case of bulk SmH2.16, the temperature dependence of the magnetic susceptibility and of the specific heat in the paramagnetic region can be described by assuming all Sm ions are Sm3+; ground state Γ8. The Cp/T exhibits an antiferromagnetic spin wave and that the Sommerfeld coefficient γ is 150 mJ/(K2 mole). In the case of SmH2+δ films, the reflectivity shows a minimum at 1–2 eV, which is possibly due to a plasma edge. The minimum show a red shift as the H/Sm ratio increases. The transmittance has a maximum at about 1 eV. The line shape of the optical conductivity cannot be explained in terms of a simple single carrier model. In the range 0.25-0.6 eV, the relaxation time increases as δ increases.
掲載誌名
広島大学大学院総合科学研究科紀要. II, 環境科学研究
5巻
開始ページ
113
終了ページ
116
出版年月日
2010-12-31
出版者
広島大学大学院総合科学研究科
ISSN
1881-7696
NCID
言語
英語
NII資源タイプ
紀要論文
広大資料タイプ
学内刊行物(紀要等)
DCMIタイプ
text
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application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 2010 Graduate School of Integrated Arts and Sciences, Hiroshima University. All rights reserved.
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部局名
総合科学研究科
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