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  • Title: Minority-spin t(2g) states and the degree of spin polarization in ferromagnetic metallic La(2-2x)Sr(1+2x)Mn(2)O(7) (x = 0.38).
    Author: Sun Z, Wang Q, Douglas JF, Lin H, Sahrakorpi S, Barbiellini B, Markiewicz RS, Bansil A, Fedorov AV, Rotenberg E, Zheng H, Mitchell JF, Dessau DS.
    Journal: Sci Rep; 2013 Nov 07; 3():3167. PubMed ID: 24196704.
    Abstract:
    A half-metal is a material with conductive electrons of one spin orientation. This type of substance has been extensively searched for due to the fascinating physics as well as the potential applications for spintronics. Ferromagnetic manganites are considered to be good candidates, though there is no conclusive evidence for this notion. Here we show that the ferromagnet La2-2xSr1+2xMn2O7 (x = 0.38) possesses minority-spin states, challenging whether any of the manganites may be true half-metals. However, when electron transport properties are taken into account on the basis of the electronic band structure, we found that the La2-2xSr1+2xMn2O7 (x = 0.38) can essentially behave like a complete half metal.
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