Positive spin polarization in Co/Al2O3/Co tunnel junctions driven by oxygen adsorption
Author(s): Belashchenko KD, Tsymbal EY, Oleynik II, van Schilfgaarde M
Source: PHYSICAL REVIEW B 71 (22): Art. No. 224422 JUN 2005
Cited: 5

• Telling ND, Van der Laan G, Ladak S, et al.
  Evidence of a barrier oxidation dependence on the interfacial magnetism in Co/alumina based magnetic tunnel junctions
  JOURNAL OF APPLIED PHYSICS 99 (8): Art. No. 08E505 APR 15 2006
  ...The results demonstrate a strong correlation between the Co moments and measured TMR values, and an enhancement in the Co moments for moderate oxidation times. ...
  
• Kim C, Chung YC
  Structural and magnetic properties of Co/alpha-Al2O3/Fe magnetic tunneling junction system: Ab initio investigations
  JOURNAL OF APPLIED PHYSICS 99 (8): Art. No. 08T302 APR 15 2006
  ...(MTJs) have been actively researched due to their potential applicability to nanoscale spin-dependent tunneling devices.[1-6] ...
  
• Kim C, Chung YC
  First-principles calculations on magnetic properties of interface-rippled Co/alpha-Al2O3/Co
  APPLIED PHYSICS LETTERS 88 (13): Art. No. 132512 MAR 27 2006
  ...Interestingly, the lattice mismatch between oxygen-terminated alpha-Al2O3 (0001) and Co (111) was less than 0.56%. This appears to be a much smaller value compared to the previous calculation by Oleinik et al.[7] ...
  ... It is worth mentioning that the ripple of the Co-interface slabs in this letter could not be seen in the previous first-principles calculation report by Oleinik et al.[7] The measured value of the rippled slab distance of Co(1)-Co(2) is much larger than the value of optimized structure of Oleinik et al. Also there is a discrepancy in the Co-O bond length of 2.01 A for this work and 2.12 A for the previous work. ...
  
• Velev JP, Belashchenko KD, Stewart DA, et al.
  Negative spin polarization and large tunneling magnetoresistance in epitaxial Co vertical bar SrTiO3 vertical bar Co magnetic tunnel junctions
  PHYSICAL REVIEW LETTERS 95 (21): Art. No. 216601 NOV 18 2005
  ... It was found that the SP of the Co|SrTiO3 interface is positive similar to that of Co|Al2O3. This result might be the consequence of O atoms adsorbed by the Co surface as was recently predicted for Co|Al2O3|Co MTJs[22]. ...
  
• Garcia V, Bibes M, Maurice JL, et al.
  Spin-dependent tunneling through high-k LaAlO3
  APPLIED PHYSICS LETTERS 87 (21): Art. No. 212501 NOV 21 2005
  ...To explain the negative spin polarization of the STO-Co interface, Oleynik et al. performed theoretical calculations and predicted the presence of a small magnetic moment on the Ti atoms ... However, Co appears to grow in hcp structure and (0001)-oriented on perovskites and this magnetic moment on Ti could not be detected experimentally[20,21]. Furthermore, in LAO the ion occupying the B site is Al that has no empty d shells that could hybridize with the orbitals of Co. All these considerations lead us to consider alternative scenarios to explain the striking similatities of the LSMO/STO/Co and LSMO/LAO/Co systems. ...
  

Large spin polarization in epitaxial and polycrystalline Ni films
Author(s): Tae Hee Kim and Jagadeesh S. Moodera
Source: Phys. Rev. B 69, 020403(R) (2004)
Cited: 0