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A Minimal tight-binding model for ferromagnetic canted bilayer manganites

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep07512· OSTI ID:1624755
 [1];  [2];  [3];  [2];  [2];  [2];  [4];  [4];  [2]
  1. Northeastern Univ., Boston, MA (United States); Boston Univ., MA (United States); DOE/OSTI
  2. Northeastern Univ., Boston, MA (United States)
  3. Northeastern Univ., Boston, MA (United States); National Univ. of Singapore (Singapore)
  4. Univ. of Colorado, Boulder, CO (United States)
+ Show Author Affiliations
Half-metallicity in materials has been a subject of extensive research due to its potential for applications in spintronics. Ferromagnetic manganites have been seen as a good candidate and aside from a small minority-spin pocket observed in La2–2xSr1+2xMn2O7 (x = 0.38), transport measurements show that ferromagnetic manganites essentially behave like half metals. Here we develop robust tight-binding models to describe the electronic band structure of the majority as well as minority spin states of ferromagnetic, spin-canted antiferromagnetic and fully antiferromagnetic bilayer manganites. Both the bilayer coupling between the MnO2 planes and the mixing of the |x2 – y2 > and |3z2 – r2 > Mn 3d orbitals play an important role in the subtle behavior of the bilayer splitting. Effects of kz dispersion are included.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC) and Advanced Light Source (ALS); Northeastern Univ., Boston, MA (United States); Univ. of Colorado, Boulder, CO (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; FG02-03ER46066; FG02-07ER46352
OSTI ID:
1624755
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 4; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Magnetic ordering induced giant optical property change in tetragonal BiFeO3 journal December 2015
Effects of strain relaxation in Pr0.67Sr0.33MnO3 films probed by polarization dependent X-ray absorption near edge structure journal January 2016

Figures / Tables (10)

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Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
electronic and spintronic devices
electronic properties and materials
magnetic properties and materials
science & technology - other topics
spintronics