Journal of Magnetics

  • 제11권3호
  • /
  • Pages.108-110
  • /
  • 2006
  • /
  • 1226-1750(pISSN)
  • /
  • 2233-6656(eISSN)
한국자기학회 (The Korean Magnetics Society)
권호 표지
DOI QR코드

DOI QR Code

A Possible Origin of Ferromagnetism in Epitaxial BiFeO3 thin Films

  • Chang, Jae-wan (Research Center for Spin Dynamics & Spin-Wave Devices (ReC-SDSW) and Nanospintronics Laboratory, School of Materials Science and Engineering, Seoul National University) ;
  • Jang, Hyun M. (Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH)) ;
  • Kim, Sang-Koog (Research Center for Spin Dynamics & Spin-Wave Devices (ReC-SDSW) and Nanospintronics Laboratory, School of Materials Science and Engineering, Seoul National University)
  • 발행 : 2006.09.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

We successfully enhanced the performance of a spin valve by inserting an ultra-thin layer of partially oxidized Fe in the pinned and free layers. With the exchange bias field kept large, the spin valve reached a GMR of 12%, which corresponded to a 55% increase in GMR when we compared it with that of spin valves without any inserted layer. The layer of partially oxidized Fe was more effective for improving the properties of the spin valve than the layer of partially oxidized $Co_{90}Fe_{10}$. Considering all the results, we can contribute the significant improvement to the combined effect of the modified local electronic structures at the Fe impurities and theenhanced spin-dependent reflections at the $\alpha-Fe_{2}O_{3} phase in the magnetic layer.

키워드

참고문헌

  1. H. Schmid, Ferroelectrics 62, 317 (1994)
  2. T. H. O'Dell, The Electrodynamics of magneto-Electric Media (North-Holland, Amsterdam, 1970)
  3. G. S. Park, J. of Magnetics 8, 164 (2003) https://doi.org/10.4283/JMAG.2003.8.4.164
  4. Yu. N. Venestsev, G. Zhdanov, and S. Solov'ev, Sov. Phy. Crystallogr. 4, 538 (1960)
  5. G. Smolenskii, V. Isupov, A. Agranovskaya, and N. Krainik, Sov. Phys. Solid State 2, 2651 (1961)
  6. P. Fischer, M. Polomskya, I. Sosnowska, and M. Szymanski, J. Phys. C 13, 1931 (1980) https://doi.org/10.1088/0022-3719/13/10/012
  7. G.. Smolenskii, V. Yudin, E. Sher, and Yu. E. Stolypin, Sov. Phys. JTEP 16, 622 (1963)
  8. F. Kubel and H. Schmid, Acta Crystallogr., Sect. B: Struct. Sci. 46, 698 (1990) https://doi.org/10.1107/S0108768190006887
  9. J. Wang, J. B. Neaton, H. Zheng, V. Nagarajan, S. B. Ogale, B. Liu, D. Viehland, V. Vaithyanayhan, D. G. Schlom, U. V. Waghmare, N. A. Spladin, K. M. Rabe, M. Wuttig, and R. Ramesh, Science 299, 1719 (2003) https://doi.org/10.1126/science.1080615
  10. W. Eerenstein, F. D. Morrison, J. Dho, M. G. Blamire, J. F. Scott, and N. D. Mathur, Science 307, 1203a (2005) https://doi.org/10.1126/science.1105422
  11. J. Wang, A. Scholl, H. Zheng, S. B. Ogale, D. Viehland, D. G. Schlom, N. A. Spladin, K. M. Rabe, M. Wuttig, L. Mohaddes, J. Neaton, U. Waghmare, T. Zhao, and R. Ramesh, Science 307, 1203b (2005) https://doi.org/10.1126/science.1103959
  12. C. Ederer and N. A. Spaldin, Phys. Rev. B 71, 224103 (2005) https://doi.org/10.1103/PhysRevB.71.224103
  13. J. Li, J. Wang, M Wuttig, R. Ramesh, N. Wang, B. Ruette, A. P. Pyatakov, A. K. Zvezdin, and D. Viehland, Appl. Phys. Lett. 84, 5261 (2004) https://doi.org/10.1063/1.1764944
  14. P. W. Anderson, Phys. Rev. 115, 2 (1959) https://doi.org/10.1103/PhysRev.115.2

피인용 문헌

  1. Ceramics vol.114, pp.1, 2010, https://doi.org/10.1080/10584587.2010.488192
  2. Multiferroic Ceramics vol.419, pp.1, 2011, https://doi.org/10.1080/00150193.2011.594739
  3. Dielectric and multiferroic properties of 0.75BiFeO3–0.25BaTiO3 solid solution vol.25, pp.2, 2014, https://doi.org/10.1007/s10854-013-1661-9
  4. Effects of BaTiO3 and SrTiO3 as the buffer layers of epitaxial BiFeO3 thin films vol.60, pp.6, 2017, https://doi.org/10.1007/s11433-017-9020-8
  5. heterostructures vol.7, pp.38, 2017, https://doi.org/10.1039/C7RA00242D