Magnetic device with a coupling layer and method of manufacturing and operation of such device
OwnerKars-Michiel Hubert Lensseninventor
Life of this patent
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Abstract
In a magnetic data storage system or a magnetic sensing system including a GMR-structure, a set of structures is introduced that influences an intrinsic magnetic or magneto resistance characteristic such as the field-offset of the GMR-structure. The set of structures is separated from the GMR-structure by a high-resistive metallic material such as Ta.
Claims16
A data storage system comprising a set of structures including:
- a first structure of layers including at least a first ferromagnetic layer and a second ferromagnetic layer with at least a separation layer of a non-magnetic material therebetween, said first structure having at least a magneto resistance effect;
- a second structure including at least one magnetic layer, said second structure influencing at least one intrinsic magnetic characteristic of said first structure;
- and said second structure being separated from said first structure by at least a spacer layer, wherein the non-magnetic material is a metal and the spacer layer comprises a high-resistive metallic material and said spacer layer furthermore causing a mainly ferromagnetic coupling of said second structure on said first structure while not substantially influencing the magnitude of the magneto resistance effect of said first structure.
A sensing system of a magnetic characteristic, said system comprising:
- a first structure of layers including at least a first ferromagnetic layer and a second ferromagnetic layer with at least a separation layer of a non-magnetic material therebetween, said first structure having at least a magneto resistance effect;
- a second structure including at least one magnetic layer, said second structure influencing at least one intrinsic magnetic characteristic of said first structure;
- and said second structure being separated from said first structure by at least a spacer layer, wherein the non-magnetic material is a metal and the spacer layer comprises a high-resistive metallic material and said spacer layer furthermore causing a mainly ferromagnetic coupling of said second structure on said first structure while not substantially influencing the magnitude of the magneto resistance effect of said first structure.
A method of fabricating a magnetic system, the method comprising the steps of:
- defining a first structure of layers including at least a first ferromagnetic layer and a second ferromagnetic layer with at least a separation layer of a non-magnetic metallic material therebetween, said first structure having at least a magneto resistance effect;
- defining a second structure, said second structure including at least one magnetic layer or a set of layers for influencing at least one intrinsic magnetic characteristic of said first structure;
- and
- defining at least one layer of a high-resistive metallic material in-between said second structure and said first structure, and said layer of a high-resistive metallic material furthermore at least partially inducing a crystallographic characteristic on said second structure.
A method of tuning a magneto resistance characteristic of a magnetic system, the system comprising a set of structures including a first structure of layers including at least a first ferromagnetic layer and a second ferromagnetic layer with at least a separation layer of a non-magnetic metallic material therebetween, said first structure having at least said magneto resistance characteristic, the method comprising the steps of:
- defining a layer of a high-resistive metallic material on said first structure;
- and
- defining a second structure including at least one magnetic layer on said layer of said high-resistive metallic material, said second structure said second structure including at least one magnetic layer or a set of layers for influencing at least one intrinsic magnetic characteristic of said first structure.
A magnetic system such as data storage system or a sensing system of a magnetic characteristic, the system comprising a set of structures including:
- a first structure of layers including at least a first ferromagnetic layer structure and a second ferromagnetic layer with at least a separation layer of a non-magnetic material therebetween, said first structure having at least a magneto resistance effect;
- a second structure including at least one magnetic layer, said second structure influencing at least one intrinsic magnetic characteristic of said first structure;
- said second structure being separated from said first structure by at least a spacer layer of a high-resistive metallic material and said spacer layer of a high-resistive metallic material furthermore influencing the coupling of said second structure on said first structure while not substantially influencing the magnitude of the magneto resistance effect of said first structure;
- and wherein
- said first ferromagnetic layer structure and said second structure respectively comprising an even or odd number of non-abutting ferromagnetic layers and an odd or even number of non-abutting ferromagnetic layers.
Dependencies are inferred from the claim text.