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US 11,367,551 B2Granted
Large moments in BCC FExCOyMNz and other alloy thin films
AssigneesMontana State University, The Regents of the University of California
InventorsRyan J. Snow, Yves U. Idzerda, Elke Arenholz
Life of this patent
Estimating the term…
Abstract
Large magnetic moment compositions are formed by stabilizing ternary or other alloys with a epitaxial control layer. Compositions that are unstable in bulk specimen are thus stabilized and exhibit magnetic moments that are greater that a Slater-Pauling limit. In one example, FexCoyMnz layers are produced on an MgO(001) substrate with an MgO surface serving to control the structure of the FexCoyMnz layers. Magnetizations greater than 3 Bohr magnetons are produced.
Claims18
A composition, comprising:
- an epitaxially enhanced magnetic layer (EEML) consisting of one or more of Fex1Coy1Mnz1, Fex2Coy2Crz2, Fex3Coy3Vz3, and/or FewCox4Mny4Crz4 or any mixture thereof wherein the EEML exhibits an average magnetic moment per atom of at least 2.45 μB, wherein x1, y1, z1, x2, y2, z2, x3, y3, z3, w, x4, y4, and z4 are positive numbers such that x1+y1+z1=1, x2+y2+z2=1, x3+y3+z3=1, and w+x4+y4+z4=1, and μB is a Bohr magneton;
- and
- an epitaxial control layer associated with a composition of the EEML.
A composition, comprising:
- one or more layers of any of Fex1Coy1Mnz1, Fex2COy2Crz2, Fex3Coy3Vz3, and/or FewCox4Mny4Crz4 or any mixture thereof having an average magnetic moment per atom of at least 2.5 μB, wherein x1, y1, z1, x2, y2, z2, x3, y3, z3, w, x4, y4, and z4 are positive numbers such that x1+y1+z1=1, x2+y2+z2=1, x3+y3+z3=1, and w+x4+y4+z4=1, and μB is a Bohr magneton;
- and
- an epitaxial control layer adjacent or near the one or more layers.
A method, comprising:
- selecting a composition is one or more of Fex1Coy1Mnz1, Fex2Coy2Crz2, Fex3Coy3Vz3 and/or FewCox4Mny4Crz4 or any mixture thereof, wherein x1, y1, z1, x2, y2, z2, x3, y3, z3, w, x4, y4, and z4 are positive numbers such that x1+y1+z1=1, x2+y2+z2=1, x3+y3+z3=1, and w+x4+y4+z4=1;
- selecting an epitaxial control layer;
- and
- depositing the selected composition on the epitaxial control layer to produce an epitaxially enhanced magnetic layer (EEML) having a thickness that is less than 100 nm and an average magnetic moment per atom of at least 2.45 μB.
1 more element
Dependencies are inferred from the claim text.