Journal of the Korean Physical Society

, Volume 72, Issue 7, pp 786–794 | Cite as

Inverse MR and Dual-AMR Phenomena in Co/CoO/Ag/Co Sandwiches

  • Nguyen Anh Tuan
  • Luong Van Su
  • Hoang Quoc Khanh
  • Nguyen Anh Tue
  • Nguyen Thi Luyen


Band-form Co/CoO/Ag/Co sandwiches were prepared using radio-frequency magnetron sputtering. The sandwiches had rather thick Co (tCO = 63 nm) and Ag (tAg = 2 ÷ 65 nm) layers and a super-thin paramagnetic cobalt monoxide (CoO) layer (< 1 nm) inserted in the Co/Ag interface. The sandwiches exhibited anomalous magnetoresistance (MR) behavior depending on the tAg value. Inverse magnetoresistance (IMR) effect was observed only at thin tAg values of 2 nm and 6 nm, whereas the dual-anisotropic MR (dual-AMR) occurred at thicker tAg values of 12 nm, 25 nm and 65 nm. A superposition of the dual-AMR and the weak IMR effects was obtained at the thickest Ag layer of 65 nm. The origin of these anomalous MR behaviors was discussed to show the prominent role of the CoO layer and large thickness of the Co and Ag layers.


Sandwich IMR Positive MR Dual-AMR Magnetic transport 


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Copyright information

© The Korean Physical Society 2018

Authors and Affiliations

  • Nguyen Anh Tuan
    • 1
  • Luong Van Su
    • 1
  • Hoang Quoc Khanh
    • 1
  • Nguyen Anh Tue
    • 2
  • Nguyen Thi Luyen
    • 3
  1. 1.International Training Institute for Materials Science (ITIMS)Hanoi University of Science and Technology (HUST)HanoiVietnam
  2. 2.Institute of Engineering Physics (IEP)Hanoi University of Science and Technology (HUST)HanoiVietnam
  3. 3.Faculty of Electronic and Electrical Engineering (FEE)Hung Yen University of Technology and Education (UTEHY)Hung YenVietnam

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