Magnetoresistive element having reduced spin transfer induced noise
First Claim
1. A magnetic element comprising:
- a pinned layer being ferromagnetic and having a pinned layer magnetization;
a spacer layer, the spacer layer being non magnetic; and
a free layer, the spacer layer residing between the pinned layer and the free layer, the free layer being ferromagnetic and having a free layer magnetization, the free layer being configured to have an increased magnetic damping constant;
wherein the free layer includes CoFeCuX where X is Tb, Gd, Pt, Ta, Os, Nb, Rh, or Ru.
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Abstract
A method and system for providing a magnetic element is disclosed. The method and system include providing a ferromagnetic pinned layer, providing a free layer, and providing a spacer layer between the pinned layer and the free layer. The pinned layer and free layer are ferromagnetic and have a pinned layer magnetization and a free layer magnetization, respectively. The spacer layer is nonmagnetic. In one aspect, the free layer is configured to have an increased magnetic damping constant. In another aspect, the method and system also include providing a second pinned layer and a second spacer layer between the free layer and the second pinned layer. In this aspect, the first pinned layer and/or the second pinned layer are configured such that a forward torque and a reflected torque due to a current driven through the magnetic element in a current-perpendicular-to-plane configuration are substantially equal and opposite.
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Citations
13 Claims
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1. A magnetic element comprising:
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a pinned layer being ferromagnetic and having a pinned layer magnetization; a spacer layer, the spacer layer being non magnetic; and a free layer, the spacer layer residing between the pinned layer and the free layer, the free layer being ferromagnetic and having a free layer magnetization, the free layer being configured to have an increased magnetic damping constant; wherein the free layer includes CoFeCuX where X is Tb, Gd, Pt, Ta, Os, Nb, Rh, or Ru. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method or providing a magnetic element comprising:
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providing a pinned layer being ferromagnetic and having a pinned layer magnetization; providing a spacer layer, the spacer layer being nonmagnetic; and providing a free layer, the spacer layer residing between the pinned layer and the free layer, the free layer being ferromagnetic and having a free layer magnetization, the free layer being configured to have an increased magnetic damping constant; wherein the free layer providing step further includes providing at least one layer of CoFeCuX where X is Tb, Gd, Pt, Ta, Os, Nb, Rh, or Ru.
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Specification