Symmetry of Wavefunction at the Interface of Fe/MgO Magnetic Tunneling Junction

We measured the anisotropy of Magnetic Compton profiles (MCP) in the Fe/MgO multilayers and compared it with band structure calculations. At the Fe/MgO interface, the |m| = 1 state in the minority band is suppressed, which in turn promotes the spin-polarized occupation of the |m| = 1 state. At the F...

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Bibliographic Details
Published in:Crystals (Basel) 2022-05, Vol.12 (5), p.690
Main Authors: Sakurai, Hiroshi, Takahashi, Manabu, Suzuki, Kosuke, Tamura, Takuro, Homma, Satoshi, Tsuji, Naruki, Sakurai, Yoshiharu
Format: Article
Language:English
Subjects:
Anisotropy
Approximation
band structure calculation
Fe/MgO
Magnesium oxide
magnetic Compton scattering
Magnetic fields
magnetic tunneling junction
Magnetism
Multilayers
Polarization (spin alignment)
Symmetry
Wave functions
X-rays
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Summary:We measured the anisotropy of Magnetic Compton profiles (MCP) in the Fe/MgO multilayers and compared it with band structure calculations. At the Fe/MgO interface, the |m| = 1 state in the minority band is suppressed, which in turn promotes the spin-polarized occupation of the |m| = 1 state. At the Fe/FeO interface of intentionally oxidized Fe/MgO multilayers, the occupations of the magnetic quantum number are almost equal (spherical) in the majority band and minority band, and therefore, the spin-polarization occupancy is also almost equal (spherical). These results contribute to the material design for MTJs as high-performance spintronic devices.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst12050690