Microstructural studies of top and bottom magnetic tunnel junctions

Portier, X.; Petford-Long, A. K.; Nickel, J. H.; Anthony, T. C.; Brug, J. A.
July 2001
Applied Physics Letters;7/2/2001, Vol. 79 Issue 1, p57
Academic Journal
High-resolution electron microscopy has been used to study the microstructural properties of top and bottom magnetic tunnel junctions. Different physical properties have been found for the two configurations, and they have been interpreted in terms of microstructural features. All physical parameters favor the bottom configuration except for the coupling field, which is higher for the bottom structure. This latter result has been explained by the more pronounced roughness at the interfaces between the electrodes and the insulator film. © 2001 American Institute of Physics.


Related Articles

  • Interfacial microstructures of ultrathin Ge layers on Si probed by x-ray scattering and.... Ming, Z.H.; Soo, Y.L. // Applied Physics Letters;9/12/1994, Vol. 65 Issue 11, p1382 

    Examines interfacial microstructures of ultrathin germanium (Ge) layers on silicon using x-ray scattering and fluorescence yield. Information on microstructures in terms of the average interfacial roughness; Determination of structural parameters by comparing experimental data with theoretical...

  • Microstructure of GaAs/GaN interfaces produced by direct wafer fusion. Jasinski, J.; Liliental-Weber, Z.; Estrada, S.; Hu, E. // Applied Physics Letters;10/21/2002, Vol. 81 Issue 17, p3152 

    Results of a transmission electron microscopy (TEM) study of directly bonded GaAs/GaN structures obtained by wafer fusion are presented. A large fraction of the interface area was found to be well bonded, with the presence of a thin (1-2 nm) amorphous layer of a native oxide at the bonded...

  • High-Field Gradient Permanent Micromagnets for Targeted Drug Delivery with Magnetic Nanoparticles. Zablotskii, Vitalii; Pastor, José Martín; Larumbe, Silvia; Pérez-Landazábal, José Ignacio; Recarte, Vicente; Gómez-Polo, Cristina // AIP Conference Proceedings;12/2/2010, Vol. 1311 Issue 1, p152 

    We analytically investigate several micromagnetic systems aimed at the optimization of drug and gene delivery processes and show their applicability to the controlled positioning of magnetic nanoparticles. The systems considered are: i) a square array of cylindrical microneedles, ii) a planar...

  • Microstructure of biepitaxial grain boundary junctions in YBa[sub 2]Cu[sub 3]O[sub 7]. Rosner, S.J.; Char, K. // Applied Physics Letters;2/24/1992, Vol. 60 Issue 8, p1010 

    Examines the microstructure of biepitaxial grain boundary junctions in YBa[sub 2]Cu[sub 3]O[sub 7] using transmission electron microscopy. Growth of YBCO and a buffer layer on a patterned magnesium oxide seed layer; Differences in the microstructure morphology; Factors influencing the ion...

  • Microstructure investigation on barrier shapes of double barrier magnetic tunnel junctions. Wang, Y.; Zeng, Z. M.; Rehana, S.; Han, X. F.; Sun, X. C.; Zhang, Z. // Journal of Applied Physics;9/1/2006, Vol. 100 Issue 5, p054510 

    Barrier shapes and its detailed microstructures in the double barrier magnetic tunnel junctions were intensively investigated by both high resolution transmission electron microscopy and electron holography. Two broad (>2 nm) potential wells (i.e., shapes of AlOx layers) with slanted interfaces...

  • Microstructure and contact resistivity of (Bi, Sb)2Te3/Sb interface. Li, Fei; Huang, Xiangyang; Jiang, Wan; Chen, Lidong // AIP Conference Proceedings;6/26/2012, Vol. 1449 Issue 1, p458 

    Thermoelectric joint composed of Bi0.5Sb1.5Te3 (BiSbTe) material and antimony (Sb) metallic interlayer was fabricated by Spark Plasma Sintering. The reliability of the joints was investigated by interfacial microstructure evolution using electron probe micro-analysis for the samples with...

  • Transmission electron microscopy study on the effect of various capping layers on CoFeB/MgO/CoFeB pseudo spin valves annealed at different temperatures. Karthik, S. V.; Takahashi, Y. K.; Ohkubo, T.; Hono, K.; Gan, H. D.; Ikeda, S.; Ohno, H. // Journal of Applied Physics;Apr2012, Vol. 111 Issue 8, p083922 

    The microstructure of pseudo spin-valve magnetic tunnel junctions (MTJs) comprising a stacking structure of Ta/Ru/Ta/CoFeB/MgO/CoFeB/ with and without X = Pd, Ti, Ta fabricated on thermally oxidized Si wafer with different annealing temperatures, Ta = 250 °C, 300 °C, 400 °C, and 500...

  • Effect of Reference Loading and Crack Configuration on the Stress Intensity Factors In Weight Function Method. Ekwaro-Osire, S.; Khandaker, M. P. H.; Gautam, K.; Lolge, G. // International Journal of Fracture;Jun2006, Vol. 139 Issue 3/4, p553 

    In calculating the stress intensity factors (SIFs) using the weight function method, the accuracy of the result depends upon proper selection of the set of reference loadings. The objective of the present work is to find a unique set of reference loadings to calculate the SIF at the tip of a...

  • Non-equilibrium phonon generation and detection in microstructure devices. Hertzberg, J. B.; Otelaja, O. O.; Yoshida, N. J.; Robinson, R. D. // Review of Scientific Instruments;Oct2011, Vol. 82 Issue 10, p104905 

    We demonstrate a method to excite locally a controllable, non-thermal distribution of acoustic phonon modes ranging from 0 to ∼200 GHz in a silicon microstructure, by decay of excited quasiparticle states in an attached superconducting tunnel junction (STJ). The phonons transiting the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics