Magneto-transport properties of sandwich films of permalloy/Cu/Co

C. K. Lo*, C. H. Ho, I. Klik, Y. D. Yao, S. F. Lee, H. H. Huang, Y. C. Chen, C. Y. Wu, D. Y. Chiang, C. A. Chang, M. T. Lin, D. R. Huang

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


The magnetic behaviour of sputtered Py5nm/Cut/Co5nm films on glass, Si(100), and Si(111) was studied by measurements of the transverse, longitudinal, polar magneto-resistance, and the magneto-optical Kerr effect (MOKE). The sample can be rotated about its surface normal to obtain angular dependent information during the MOKE measurement. All specimens have non-vanishing normal component of magnetization as revealed by MR with field applied normal to the film and confirmed by polar MOKE. Spin valve MR with very small coercivity is observed as t is increased. The minor R-H curve shows two states at zero magnetic field, which is desirable for MRAM application. An increase in the periodicity number increases the MR ratio, but also, significantly, the coercivity.

Original languageEnglish
Pages (from-to)67-72
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Publication statusPublished - 1998
Externally publishedYes
EventProceedings of the 1998 MRS Spring Symposium - San Francisco, CA, USA
Duration: 1998 Apr 131998 Apr 15

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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