한국진공학회지 (Journal of the Korean Vacuum Society)

한국진공학회 (The Korean Vacuum Society)
권호 표지

Magnetoresistance behavior of $La_{1-\chi}Sr_\chiCoO_{3-\delta}$ films around the metal-insulator transition

  • Park, J. S. (q-Psi and Dept. of Physics, Hanyang University) ;
  • Park, H. G. (q-Psi and Dept. of Physics, Hanyang University) ;
  • Kim, C. O. (q-Psi and Dept. of Physics, Hanyang University) ;
  • Lee, Y. P. (q-Psi and Dept. of Physics, Hanyang University) ;
  • V. G. Prokhorov (Institute of Metal Physics, NASU)
  • 발행 : 2003.10.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

The magnetoresistance (MR) of $La_{1-\chi}S_{\chi}CoO_{3-\delta}$ films prepared by pulsed-laser deposition were investigated in order to clarify the magnetotransport properties around the metal-insulator transition. For the films in the metallic state ($\chi$ > 0.25), the MR(T) manifests a small peak at the Curie temperature due to the spin-disorder scattering. The transition of the film into the insulating state ($\chi\;\leq$ 0.25) is accompanied by an essential growth of the MR and results in a significant increase in the MR(T) with decreasing temperature, due to a phase separation into the ferromagnetic-metal clusters and the insulating matrix.

키워드

참고문헌

  1. S. Jin, T. H. Tiefel, M. McCormack, R. A. Fastnacht, R. Ramesh, and L. H. Chen, Science 264, 413 (1994) https://doi.org/10.1126/science.264.5157.413
  2. H. Y. Hwang, S.-W. Cheong, N. P. Ong, and B. Batlogg, Phys. Rev. Lett. 77, 2041 (1996) https://doi.org/10.1103/PhysRevLett.77.2041
  3. T. Saitoh, T. Mizokawa, A. Fujimori, M. Abbate, Y. Takeda, and M. Takano, Phys. Rev. B 56, 1290 (1997) https://doi.org/10.1103/PhysRevB.56.1290
  4. S. Yamaguchi, Y. Okimoto, H. Taniguchi, and Y Tokura, Phys. Rev. B 53, R2926 (1996) https://doi.org/10.1103/PhysRevB.53.R2926
  5. R. R. Heikes, R. C. Miller, and R. Mazelsky, Physica 30, 1600 (1964) https://doi.org/10.1016/0031-8914(64)90182-X
  6. V. G. Bhide, D. S. Rajoria, C. N. R. Rao, and R. G. Rama, Phys. Rev. B 12, 2832 (1975) https://doi.org/10.1103/PhysRevB.12.2832
  7. N. Furukawa, J. Phys. Soc. Jpn. 64, 3164 (1995) https://doi.org/10.1143/JPSJ.64.3164
  8. R. Mahendiran, A. K. Raychaudhuri, A. Chainani, and D. D. Sarma, J. Phys.: Condens. Matter. 7, L561 (1995)
  9. S. Yamaguchi, H. Taniguchi, H. Takagi, T. Arima, and Y. Tokura, J. Phys. Soc. Jpn. 54, 1885 (1995)
  10. M. Itoh, I. Natori, S. Kubota, and K. Motoya, J Phys. Soc. Jpn. 63, 1486 (1994) https://doi.org/10.1143/JPSJ.63.1486