TITLE

Magnetization reversal in sub-100 nm pseudo-spin-valve element arrays

AUTHOR(S)
Castan˜o, F. J.; Hao, Y.; Hwang, M.; Ross, C. A.; Vo¨geli, B.; Smith, Henry I.; Haratani, S.
PUB. DATE
September 2001
SOURCE
Applied Physics Letters;9/3/2001, Vol. 79 Issue 10
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The magnetization reversal exhibited by arrays of 70-nm-wide pseudo-spin-valve (PSV) elements has been investigated by measurements of minor hysteresis loops. Samples were patterned from sputtered NiFe (6 nm)/Cu (3 and 6 nm)/Co (4 nm)/Cu (4 nm) magnetic thin film stacks. The overall room temperature magnetic behavior of the arrays can be understood by considering a distribution of switching fields for both the hard (Co) and soft (NiFe) magnetic layers. Such layers interact through exchange and magnetostatic coupling. Increasing the lengths of the elements leads to narrower switching field distributions and higher mean switching fields (particularly for the hard layer). On the other hand, decreasing the thickness of the Cu spacer leads to an increase of the switching field of the hard layer. Results obtained are well described by a model that treats each PSV as a coupled pair of rectangular single-domain films and uses the values of the interaction field between layers deduced from experimental minor loops. © 2001 American Institute of Physics.
ACCESSION #
5072610

 

Related Articles

  • Vortex-flux rotation in polycrystalline YBa2Cu3O7 at 77 K. Liu, Liwen; Kouvel, J. S.; Brun, T. O. // Journal of Applied Physics;11/15/1991, Vol. 70 Issue 10, p5733 

    Presents a study that measured the magnetization-vector at 77 K on a field-cooled sample. Discussion on magnetic properties; Information on the scales of hysteresis loop obtained from the samples.

  • Analysis of hysteresis loops in Nd-Fe-B sintered magnets. Givord, D.; Tenaud, P.; Viadieu, T. // Journal of Applied Physics;11/1/1986, Vol. 60 Issue 9, p3263 

    Presents a study which examined the magnetic properties of NdFeB permanent magnets of small sizes by analyzing hysteresis loops in neodymium-iron-boron- sintered magnets. Details of the experimental methods; Results of the magnetization experiments; Calculation of the magnetization...

  • In situ observation of interactions between Bloch walls and local crystalline defects. Hartmann, U. // Journal of Applied Physics;1/1/1988, Vol. 63 Issue 1, p167 

    Investigates the influence of local crystalline defects upon the magnetization process of single-crystalline iron whiskers by direct observation of domain configuration and by inductive magnetization measurements. Use of inductive hysteresis loop tracer to record quasistatic magnetization...

  • Origin of inverted-in-sense and constricted near-surface hysteresis loops of magnetic plates. Tejedor, M.; Rubio, H.; Fernández, A. // Applied Physics Letters;10/30/1989, Vol. 55 Issue 18, p1920 

    New types of magnetic hysteresis loops, inverted-in-sense and crossed, have been observed in some directions of the surface of METGLAS 2605SC circular plates (Allied Chemical Corp.) The origin of these kinds of loops and other constricted ones observed in the surface of magnetic plates is...

  • Autocalibrating quasistatic M-H hysteresis loop tracer with negligible drift. Franco, V.; Ramos-Martos, J. // Review of Scientific Instruments;Dec1996, Vol. 67 Issue 12, p4167 

    Describes a computer-controlled system for measuring M-H hysteresis loops of soft magnetic materials. Problems with measurements of low coercivity materials; How the combination of low drift hardware and measurement procedure makes software correction unnecessary; Avoidance of residual drift of...

  • Soft x-ray synchrotron radiation facilities for the study of magnetic materials (invited) (abstract). Tonner, Brian; O’Brien, W.; Green, M. A.; Höchst, H.; Reininger, R. // Journal of Applied Physics;5/15/1994, Vol. 75 Issue 10, p6811 

    Presents an abstract of the study 'Soft X-Ray Synchrotron Radiation Facilities for the Study of Magnetic Materials,' by Brian Tonner, W. O'Brien, M.A. Green, H. Höchst and R. Reininger.

  • Frequency dependence of hysteresis curves in conducting magnetic materials (abstract). Jiles, D. C. // Journal of Applied Physics;5/15/1994, Vol. 75 Issue 10, p5511 

    Presents an abstract of the study 'Frequency Dependence of Hysteresis Curves in Conducting Magnetic Materials ,' by D.C. Jiles.

  • Field orientations and sweep rate effects on magnetic switching of Stoner–Wohlfarth particles. Lu, Jing Ju; Huang, Huei Li; Klik, I. // Journal of Applied Physics;8/1/1994, Vol. 76 Issue 3, p1726 

    Presents information on a study which examined the field angles and sweep rate dependence of coercivity of the Stoner-Wolfarth particles based on the decay-rate model. Description of the obtained hysteresis loop; Methodology of the study; Results and discussion.

  • Surface barriers and two-dimensional-collective pinning in single crystal Nd1.85Ce0.15CuO4-δ superconductors. Zuo, F.; Khizroev, S.; Jiang, Xiuguang; Peng, J. L.; Greene, R. L. // Journal of Applied Physics;11/15/1994, Vol. 76 Issue 10, p6953 

    Focuses on a study which examined the magnetization in a single crystal Nd[sub1.85]Ce[0.15]CuO[sub4-δ] superconductors in the magnetic field parallel to the c-axis direction. Way in which the crystal was grown; Details on hysteresis loops; Predictions based on the collective pinning theory.

  • Anomalous position of the maximum in magnetic hysteresis loops measured on.... Koblischka, M.R.; Pust, L. // Applied Physics Letters;1/27/1997, Vol. 70 Issue 4, p514 

    Observes an anomalous position of the central peak of magnetic hysteresis loops in (Bi,Pb)-2223/Ag tapes. Method for modeling the grain structure; Role of the sign of the internal field B[sub i] at the circumference of thin well oriented grains in the tape; Comparison of the internal field to...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics