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Exchange bias and magnetization process of Co/CoO nanocomposite thin films

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Exchange bias and magnetization process of Co/CoO nanocomposite thin films
นักวิจัย : Yi, J. B. , Ding, Jun , Liu, Bing Hai , Dong, Zhili , White, Timothy John , Liu, Y.
คำค้น : DRNTU::Engineering::Materials::Magnetic materials.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2547
อ้างอิง : Yi, J. B., Ding, J., Liu, B. H., Dong, Z. L., White, T., & Liu, Y. (2005). Exchange bias and magnetization process of Co/CoO nanocomposite thin films. Journal of Magnetism and Magnetic Materials, 285(1-2), 224-232. , 0304-8853 , http://hdl.handle.net/10220/8878 , http://dx.doi.org/10.1016/j.jmmm.2004.07.044
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Journal of magnetism and magnetic materials
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Co/CoO nanocomposite thin films have been deposited by RF sputtering with different oxygen partial pressures in the working atmosphere. It has been found that the magnetic properties (exchange bias (EB), coercivity and remanence) of the films are strongly dependent on the oxygen partial pressure. Film deposited with an O2 pressure of 0.75×10^−5 Torr shows a relatively high coercivity and high remanence ratio. Enhanced asymmetry of magnetization reversal appears in the film deposited with 1.5×10^−5 Torr O2 partial pressure. When the O2 partial pressure is increased to 3.0×10^−5 Torr, a strong reduction in EB and coercivity have been obtained. The investigation of the microstructure using high-resolution transmission electron microscope reveals that the change in EB, remanence and coercivity is probably related to the competition between dipolar interaction and exchange coupling. Magnetoresistance and extraordinary Hall effect (EHE) of the Co/CoO nanocomposite films is also investigated in dependence on oxygen partial pressure. The film deposited under 2.3×10^−5 Torr of oxygen exhibits strongly enhanced asymmetric magnetization reversal and unusually high EHE with a high coercivity.

บรรณานุกรม :
Yi, J. B. , Ding, Jun , Liu, Bing Hai , Dong, Zhili , White, Timothy John , Liu, Y. . (2547). Exchange bias and magnetization process of Co/CoO nanocomposite thin films.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Yi, J. B. , Ding, Jun , Liu, Bing Hai , Dong, Zhili , White, Timothy John , Liu, Y. . 2547. "Exchange bias and magnetization process of Co/CoO nanocomposite thin films".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Yi, J. B. , Ding, Jun , Liu, Bing Hai , Dong, Zhili , White, Timothy John , Liu, Y. . "Exchange bias and magnetization process of Co/CoO nanocomposite thin films."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2547. Print.
Yi, J. B. , Ding, Jun , Liu, Bing Hai , Dong, Zhili , White, Timothy John , Liu, Y. . Exchange bias and magnetization process of Co/CoO nanocomposite thin films. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2547.