Institut Fuer Physikalische Hochtechnologie E.v.

Tim Mewes

Roland Mattheis

Arno Ehresmann

Burkard Hillebrands

Wolfgang-Dietrich Engel

Juergen Fassbender

The invention relates to a Wheatstone bridge containing bridge elements that are connected in a conventional manner and consisting of a spin-valve system, in addition to a method for producing the same. The aim of the invention is to produce a Wheatstone bridge, in which respective half-bridges lying adjacent to one another have a respective non-parallel bias magnetisation direction. To achieve this, the respective bridge elements that are not adjacent (or) are provided with a doping of implantable ions in quantities of between 1.10and 5.10atoms/cm2 beneath the pinned ferromagnetic layer of a GMR- or TMR-spin-valve layer system. During the bombardment of selected bridge areas () or surface areas, which are not provided with a covering (), with a low dose of low-energy ions, whose strengths are sufficiently great to enable the is ions to penetrate the pinned ferromagnetic layer, all surface areas or bridge elements () are exposed to a homogeneous, targeted magnetic field of sufficient strength.

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Zweibruecken, Germany

Tim Mewes