Repository logo
  • English
  • 中文
Log In
Have you forgotten your password?
  1. Home
  2. College of Science / 理學院
  3. Physics / 物理學系
  4. Magnetic properties of oxide-coated iron nanoparticles synthesized by electrodeposition
 
  • Details

Magnetic properties of oxide-coated iron nanoparticles synthesized by electrodeposition

Journal
Journal of Magnetism and Magnetic Materials
Journal Volume
219
Journal Issue
1
Pages
45-52
Date Issued
2000
Author(s)
Banerjee, S.
Roy, S.
JENG-WEI CHEN  
Chakravorty, D.
DOI
10.1016/S0304-8853(00)00417-0
URI
http://www.scopus.com/inward/record.url?eid=2-s2.0-0034238893&partnerID=MN8TOARS
http://scholars.lib.ntu.edu.tw/handle/123456789/289373
Abstract
Nanometre-sized iron particles with diameters in the range 4.9-11.1 nm have been grown within a silica gel matrix by electrodeposition. Electron diffraction pattern shows the presence of an oxide (either Fe3O4 or γ-Fe2O3) shell on these particles. The variation of magnetization as a function of temperature has been analyzed using the Bloch equation. The Bloch exponent obtained as a function of particle size shows a trend different from that predicted theoretically. Zero field cooled (ZFC) and field cooled (FC) measurements on the nanocomposites have been carried out over the temperature range 2-300 K. Coercivity shows a decrease with increasing temperature. Also, a loop shift as a function of temperature is exhibited by the specimens. This shift disappears at a temperature around 50 K. This behavior is ascribed to an exchange interaction of the iron core with a ferrimagnetic oxide (either Fe3O4 or γ-Fe2O3) shell.
Other Subjects
Coercive force; Crystal growth; Electrodeposition; Ferrimagnetic materials; Magnetization; Nanostructured materials; Particle size analysis; Silica gel; Synthesis (chemical); Thermal effects; Nanoparticles; Iron
Type
journal article

臺大位居世界頂尖大學之列,為永久珍藏及向國際展現本校豐碩的研究成果及學術能量,圖書館整合機構典藏(NTUR)與學術庫(AH)不同功能平台,成為臺大學術典藏NTU scholars。期能整合研究能量、促進交流合作、保存學術產出、推廣研究成果。

To permanently archive and promote researcher profiles and scholarly works, Library integrates the services of “NTU Repository” with “Academic Hub” to form NTU Scholars.

總館學科館員 (Main Library)
醫學圖書館學科館員 (Medical Library)
社會科學院辜振甫紀念圖書館學科館員 (Social Sciences Library)

開放取用是從使用者角度提升資訊取用性的社會運動,應用在學術研究上是透過將研究著作公開供使用者自由取閱,以促進學術傳播及因應期刊訂購費用逐年攀升。同時可加速研究發展、提升研究影響力,NTU Scholars即為本校的開放取用典藏(OA Archive)平台。(點選深入了解OA)

  • 請確認所上傳的全文是原創的內容,若該文件包含部分內容的版權非匯入者所有,或由第三方贊助與合作完成,請確認該版權所有者及第三方同意提供此授權。
    Please represent that the submission is your original work, and that you have the right to grant the rights to upload.
  • 若欲上傳已出版的全文電子檔,可使用Open policy finder網站查詢,以確認出版單位之版權政策。
    Please use Open policy finder to find a summary of permissions that are normally given as part of each publisher's copyright transfer agreement.
  • 網站簡介 (Quickstart Guide)
  • 使用手冊 (Instruction Manual)
  • 線上預約服務 (Booking Service)
  • 方案一:臺灣大學計算機中心帳號登入
    (With C&INC Email Account)
  • 方案二:ORCID帳號登入 (With ORCID)
  • 方案一:定期更新ORCID者,以ID匯入 (Search for identifier (ORCID))
  • 方案二:自行建檔 (Default mode Submission)
  • 方案三:學科館員協助匯入 (Email worklist to subject librarians)

Built with DSpace-CRIS software - Extension maintained and optimized by 4Science