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Dąbrowski M, Peixoto TRF, Pazgan M, Winkelmann A, Cinal M, Nakagawa T, Takagi Y, Yokoyama T, Bisio F, Bauer U, Yildiz F, Przybylski M, Kirschner J. Oscillations of the orbital magnetic moment due to d-band quantum well states. PHYSICAL REVIEW LETTERS 2014; 113:067203. [PMID: 25148348 DOI: 10.1103/physrevlett.113.067203] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Indexed: 06/03/2023]
Abstract
The effect of electron confinement on the magnetocrystalline anisotropy of ultrathin bcc Fe films is explored by combining photoemission spectroscopy, x-ray magnetic circular dichroism, and magneto-optical Kerr effect measurements. Pronounced thickness-dependent variations in the magnetocrystalline anisotropy are ascribed to periodic changes in the density of states at the Fermi level, induced by quantization of d(xz), d(yz) out-of-plane orbitals. Our results reveal a direct correlation between quantum well states, the orbital magnetic moment, and the magnetocrystalline anisotropy.
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Affiliation(s)
- M Dąbrowski
- Max-Planck-Institut für Mikrostrukturphysik, 06120 Halle, Germany
| | - T R F Peixoto
- Max-Planck-Institut für Mikrostrukturphysik, 06120 Halle, Germany
| | - M Pazgan
- Max-Planck-Institut für Mikrostrukturphysik, 06120 Halle, Germany
| | - A Winkelmann
- Max-Planck-Institut für Mikrostrukturphysik, 06120 Halle, Germany
| | - M Cinal
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland
| | - T Nakagawa
- Institute for Molecular Science, Myodaiji-cho, Okazaki, Aichi 444-8585, Japan
| | - Y Takagi
- Institute for Molecular Science, Myodaiji-cho, Okazaki, Aichi 444-8585, Japan
| | - T Yokoyama
- Institute for Molecular Science, Myodaiji-cho, Okazaki, Aichi 444-8585, Japan
| | - F Bisio
- CNR-SPIN Corso Perrone 24, I-16152 Genova, Italy
| | - U Bauer
- Max-Planck-Institut für Mikrostrukturphysik, 06120 Halle, Germany
| | - F Yildiz
- Max-Planck-Institut für Mikrostrukturphysik, 06120 Halle, Germany
| | - M Przybylski
- Max-Planck-Institut für Mikrostrukturphysik, 06120 Halle, Germany and Faculty of Physics and Applied Computer Science, and Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, 30-059 Kraków, Poland
| | - J Kirschner
- Max-Planck-Institut für Mikrostrukturphysik, 06120 Halle, Germany and Naturwissenschaftliche Fakultät II, Martin-Luther-Universität Halle-Wittenberg, 06120 Halle, Germany
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Obied LH, Crandles DA, Antonov VN, Bose SK, Jepsen O. Infrared spectroscopy and the ferromagnetic transition in Gd. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2013; 25:036002. [PMID: 23221360 DOI: 10.1088/0953-8984/25/3/036002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The low energy electronic structure of Gd has been investigated experimentally by infrared reflectance spectroscopy, and theoretically from first principles, using the fully relativistic Dirac linear-muffin-tin-orbital (LMTO) method in the local spin density approximation (LSDA) as well as within the LSDA + U approach. The reflectance of a Gd single crystal was measured with the electric field in the plane perpendicular to the c-axis for temperatures between 50 K and slightly above the Curie temperature (293 K) in the frequency range between 100 and 12 000 cm(-1) (0.013-1.5 eV). As Gd enters the ferromagnetic state, the dissipative part of the optical conductivity exhibits interesting spectral weight transfers over the whole spectral range measured. It is shown that the ab initio calculations reproduce well the experimental spectra for the ferromagnetic state and allow one to explain the microscopic origin of the optical response of Gd in terms of interband transitions.
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Affiliation(s)
- L H Obied
- Department of Physics, Brock University, St. Catharines, ON, L2S 3A1, Canada
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Ackermann B, Feder R. Relativistic theory of photoemission and bremsstrahlung from ferromagnets. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/18/5/016] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Fritsche L, Noffke J, Eckardt H. A relativistic treatment of interacting spin-aligned electron systems: application to ferromagnetic iron, nickel and palladium metal. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0305-4608/17/4/021] [Citation(s) in RCA: 127] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ebert H, Strange P, Gyorffy BL. The influence of relativistic effects on the magnetic moments and hyperfine fields of Fe, Co and Ni. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0305-4608/18/7/002] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kuch W, Dittschar A, Meinel K, Zharnikov M, Schneider CM, Kirschner J, Henk J, Feder R. Magnetic-circular-dichroism study of the valence states of perpendicularly magnetized Ni(001) films. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:11621-11630. [PMID: 9982785 DOI: 10.1103/physrevb.53.11621] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Henk J, Halilov SV, Scheunemann T, Feder R. Magnetic linear dichroism and spin polarization in 3d-band photoemission. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:8130-8133. [PMID: 9974828 DOI: 10.1103/physrevb.50.8130] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Schneider CM, Hammond MS, Schuster P, Cebollada A, Miranda R, Kirschner J. Observation of magnetic circular dichroism in uv photoemission from ferromagnetic fcc cobalt films. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:12066-12069. [PMID: 9999354 DOI: 10.1103/physrevb.44.12066] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Solovyev IV, Liechtenstein AI, Gubanov VA, Antropov VP, Andersen OK. Spin-polarized relativistic linear-muffin-tin-orbital method: Volume-dependent electronic structure and magnetic moment of plutonium. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:14414-14422. [PMID: 9997332 DOI: 10.1103/physrevb.43.14414] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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