Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-07-11
Phys. Rev. B 72 (2005) 104416
Physics
Condensed Matter
Strongly Correlated Electrons
to be published in Physical Review B
Scientific paper
10.1103/PhysRevB.72.104416
We report the \QTR{it}{pinned/biased} \QTR{it}{moment} in the superlattices consisting of ferromagnetic (FM) SrRuO$_3$ and antiferromgnetic (AFM) SrMnO$_3$. This superlattice system shows anisotropy and oriented pinning/biasing in the field-cooled (FC) hysteresis loop. The in-plane cooling-field provides antiferromagnetic orientations while out-of-plane cooling-field provides ferromagnetic orientations to the pinned/biased moments. The spacer layer thickness, strength and orientation of magnetic field, cooling field, and driving current influence the pinning strength. We propose that the magnetic structure is a repetition of $AFM/Pin/FM$($Free$)/$Pin$ unit below a critical field to explain its magnetic and transport properties. The transport behavior is discussed using the spin-dependent conduction.
Padhan Prahallad
Prellier Wilfrid
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