Half-metallic ferromagnetism: Example of CrO2 (invited)

作者: J. M. D. Coey , M. Venkatesan

DOI: 10.1063/1.1447879

关键词: Condensed matter physicsHall effectElectronic structureMetalSpin polarizationElectronMagnetoresistanceFerromagnetismMaterials scienceElectronic band structure

摘要: A broad classification scheme is proposed for half-metallic ferromagnets which embraces the possibilities of itinerant and localized electrons, as well semimetallic semiconducting electronic structure. Examples each type are given. The problems defining measuring spin polarization discussed some characteristics half-metals reviewed with reference to chromium dioxide.

参考文章(55)
I. I. Mazin, Robust half metalicity in FexCo1−xS2 Applied Physics Letters. ,vol. 77, pp. 3000- 3002 ,(2000) , 10.1063/1.1324720
I. I. Mazin, How to Define and Calculate the Degree of Spin Polarization in Ferromagnets Physical Review Letters. ,vol. 83, pp. 1427- 1430 ,(1999) , 10.1103/PHYSREVLETT.83.1427
P. G. Ivanov, S. M. Watts, D. M. Lind, Epitaxial growth of CrO2 thin films by chemical-vapor deposition from a Cr8O21 precursor Journal of Applied Physics. ,vol. 89, pp. 1035- 1040 ,(2001) , 10.1063/1.1331343
K.-I. Kobayashi, T. Kimura, H. Sawada, K. Terakura, Y. Tokura, Room-temperature magnetoresistance in an oxide material with an ordered double-perovskite structure Nature. ,vol. 395, pp. 677- 680 ,(1998) , 10.1038/27167
S.H Liu, Itinerant ferromagnetism in the narrow band limit Journal of Magnetism and Magnetic Materials. ,vol. 212, pp. 259- 266 ,(2000) , 10.1016/S0304-8853(99)00791-X
P. A. Stampe, R. J. Kennedy, S. M. Watts, S. von Molnár, Strain effects in thin films of CrO2 on rutile and sapphire substrates Journal of Applied Physics. ,vol. 89, pp. 7696- 7698 ,(2001) , 10.1063/1.1362657
J. M. D. Coey, Powder magnetoresistance (invited) Journal of Applied Physics. ,vol. 85, pp. 5576- 5581 ,(1999) , 10.1063/1.369899
A. Gupta, X. W. Li, Gang Xiao, Inverse magnetoresistance in chromium-dioxide-based magnetic tunnel junctions Applied Physics Letters. ,vol. 78, pp. 1894- 1896 ,(2001) , 10.1063/1.1356726
Valentin Yu Irkhin, M I Katsnel'son, Half-metallic ferromagnets Physics-Uspekhi. ,vol. 37, pp. 659- 676 ,(1994) , 10.1070/PU1994V037N07ABEH000033
M Pénicaud, B Siberchicot, CB Sommers, J Kübler, None, Calculated electronic band structure and magnetic moments of ferrites Journal of Magnetism and Magnetic Materials. ,vol. 103, pp. 212- 220 ,(1992) , 10.1016/0304-8853(92)90255-M