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重い電子系Ce(Ru，T)2Si2の磁性における遷移金属T置換効果
http://hdl.handle.net/10258/1137
http://hdl.handle.net/10258/1137168b6cc6-c979-49f7-a753-39b335ed7493
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
kou-21 (18.4 MB)
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| アイテムタイプ | 学位論文 / Thesis or Dissertation(1) | |||||||||||||
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| 公開日 | 2012-05-25 | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | 重い電子系Ce(Ru，T)2Si2の磁性における遷移金属T置換効果 | |||||||||||||
| 言語 | ja | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | EFFECT OF THE TRANSITION MErrAL T SUBSTITUTION ON THE MAGNETIC PROPERTY IN HEAVY FERMION SYSTEM Ce(Ru, T )2Si2 | |||||||||||||
| 言語 | en | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | jpn | |||||||||||||
| 資源タイプ | ||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||||||||
| 資源タイプ | doctoral thesis | |||||||||||||
| アクセス権 | ||||||||||||||
| アクセス権 | open access | |||||||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||||||
| 著者 |
関根, ちひろ
× 関根, ちひろ
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| 室蘭工業大学研究者データベースへのリンク | ||||||||||||||
| 表示名 | 関根 ちひろ（SEKINE Chihiro） | |||||||||||||
| URL | http://rdsoran.muroran-it.ac.jp/html/100000003_ja.html | |||||||||||||
| 抄録 | ||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||
| 内容記述 | Paramagnetic heavy-fermion compound CeRu_2Si_2 shows a number of unusual magnetic properties due to the competition between the Kondo fluctuation and the antiferromagnetic correlation. One of the remarkable features at low temperature is the metamagnetic non-linear magnetization process. Although several models for the metamagnetism in CeRu_2Si_2 have been proposed so far，full explanation of this phenomenon has not been established yet. However the experiments of high pressure: and substituting La，Y for Ce in CeRu_2Si_2 show that this metamagnetism is strongly related to Kondo effect. In this paper， magnetic susceptibility， magnetization and specific heat measurements and μSR experiments have been performed on Ce(Ru_1-x>T_x)_2Si_2 (T = Rh(4d^7 5s^1)，Mo(4d^7 5s^1)，Pd (4d^7 5s^1)) in the Ru (4d^7 5s^1) rich region(O<_ _ -x<O.5) with a special interest in the small T substitution effects on the Kondo effect，the antiferromagnetic (AF) correlation and the metamagnetic transition in CeRu_2Si_2. The present study clearly demonstrates that the small T doping has a significant effect on the magnetic fluctuations in CeRu_2Si_2 Then we obtain new information as follows. (1) The shift of Kondo temperature and metamagnetic transition field in this system was opposite to what is expected from the simple volume effect discussed about substitution for Ce site so far. This result suggests that c-f hybridization of the system is rather sensitive to the d-electron number. In these solid solutions，the change in the d-electron number is overwhelming the volume effect. (2) At low Rh and Pd concentration，a weak AF ordering appears respectively. The nature of the ordering seems to be， however， not so simple. First of all，the ordered moment is small. We consider that in the weak AF ordering state the local fluctuation still plays a role. Further μSR measurement indicates the existence of complicated magnetic ordering as SDW in Rh doped system. This point is in contrast with the La doped system where the AF long range order with rather localized character is observed. (3) For Rh doped system metamagnetic transition clearly exists in the AF ordered samples，where another transition is observed in field at H_C below the metamagnetic transition field H_M. This is interpreted as follow; the AF ordering is destroyed above H_C and the system further undergoes a metamagnetic transition at H_M. Coexistence of antiferrmagnetism and metamagnetism has not been reported yet. Thus，a study in further detail of this system is significant in order to make clear metamagnetism. | |||||||||||||
| 言語 | ja | |||||||||||||
| 学位授与機関 | ||||||||||||||
| 学位授与機関識別子Scheme | kakenhi | |||||||||||||
| 学位授与機関識別子 | 10103 | |||||||||||||
| 学位授与機関名 | 室蘭工業大学 | |||||||||||||
| 言語 | ja | |||||||||||||
| 学位授与機関名 | Muroran Institute of Technology | |||||||||||||
| 言語 | en | |||||||||||||
| 学位名 | ||||||||||||||
| 学位名 | 博士（工学） | |||||||||||||
| 言語 | ja | |||||||||||||
| 学位の種別 | ||||||||||||||
| 言語 | ja | |||||||||||||
| 値 | 課程博士 | |||||||||||||
| 学位授与番号 | ||||||||||||||
| 学位授与番号 | 甲第21号 | |||||||||||||
| 報告番号 | ||||||||||||||
| 言語 | ja | |||||||||||||
| 値 | 甲第21号 | |||||||||||||
| 学位記番号 | ||||||||||||||
| 言語 | ja | |||||||||||||
| 値 | 博甲第21号 | |||||||||||||
| 研究科・専攻 | ||||||||||||||
| 言語 | ja | |||||||||||||
| 値 | 工学研究科・生産情報システム工学専攻 | |||||||||||||
| 学位授与年月日 | ||||||||||||||
| 学位授与年月日 | 1994-03-24 | |||||||||||||
| 日本十進分類法 | ||||||||||||||
| 主題Scheme | NDC | |||||||||||||
| 主題 | 428.9 | |||||||||||||
| 著者版フラグ | ||||||||||||||
| 出版タイプ | VoR | |||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||||
| フォーマット | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | application/pdf | |||||||||||||
