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Low Temperature Specific Heat of Amorphous (Co_<1-x>Mn_x)_<100-y>B_y Alloys
https://doi.org/10.50974/00043406
https://doi.org/10.50974/0004340683d1eb87-eb84-40b1-bd74-8714a83bd8fa
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
KJ00004200303.pdf (431.2 kB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||
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| 公開日 | 2008-05-02 | |||||||
| タイトル | ||||||||
| タイトル | Low Temperature Specific Heat of Amorphous (Co_<1-x>Mn_x)_<100-y>B_y Alloys | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||
| 資源タイプ | departmental bulletin paper | |||||||
| ID登録 | ||||||||
| ID登録 | 10.50974/00043406 | |||||||
| ID登録タイプ | JaLC | |||||||
| 著者 |
Obi, Yoshihisa
× Obi, Yoshihisa
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| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | The low temperature specific heat (C_p) for the (Co_<1-x>Mn_x)_<100-y>B_y amorphous alloy series has been studied in the temperature range between 0.4 and 50K using a pumped ^3He-cryostat. Below about 10K, C_p for all the present samples can be well fitted to the ordinary expression C_p=γT+βT^3. The linearly temperature-dependent coefficient γ depends strongly on Mn concentration, that is, with increasing Mn concentration, γ values remarkably increase, for example γ of Co_<76>B_<24> is 5.9mJmol^<-1>K^<-2>, while that of (Co_<0.6>Mn_<0.4>)_<76>B_<24> is 15.6mJmol^<-1>K^<-2>. This rather large γ value cannot be explained only by the electronic term and must be attributed to the large magnetic contribution presumably due to the frustration in the spin system. The large γ values also have been obtained in the other amorphous spin glass alloys such as Fe-Ni-P-B, Fe-Zr and Co-Y. On the other hand, Mn concentration dependence of Debye temperature has a discontinuity at certain Mn concentration which corresponds to the same Co/Mn ratio at which the martensitic phase change occurs in the crystalline Co-Mn alloy. This discontinuity reflects a change in phonon behavior which must arise from substantial differences in the amorphous microstructure. | |||||||
| 書誌情報 |
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy 巻 34, 号 2, p. 241-250, 発行日 1989-03-20 |
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| ISSN | ||||||||
| 収録物識別子タイプ | ISSN | |||||||
| 収録物識別子 | 00408808 | |||||||
| 書誌レコードID | ||||||||
| 収録物識別子タイプ | NCID | |||||||
| 収録物識別子 | AA00836167 | |||||||
| フォーマット | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | application/pdf | |||||||
| 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 | |||||||
| 出版者 | ||||||||
| 出版者 | Tohoku University | |||||||
| 資源タイプ | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 紀要類(bulletin) | |||||||
| 登録日 | ||||||||
| 日付 | 2008-05-02 | |||||||
| 日付タイプ | Created | |||||||
| 公開日（投稿完了日） | ||||||||
| 日付 | 2008-05-02 | |||||||
| 日付タイプ | Created | |||||||
| 発行日 | ||||||||
| 日付 | 1989-03-20 | |||||||
| 日付タイプ | Created | |||||||
| フォーマット | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 431192 bytes | |||||||
| 更新日 | ||||||||
| 日付 | 2010-01-27 | |||||||
| 日付タイプ | Created | |||||||
