Related Experiment Video
Updated: Oct 14, 2025
Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition
Published on: July 26, 2016
Understanding complex multiple sublattice magnetism in double double perovskites.
Anita Halder1,2, Shreya Das1, Prabuddha Sanyal3
1Department of Condensed Matter Physics and Material Sciences, S.N. Bose National Centre for Basic Sciences, JD Block, Sector-III, Salt Lake City, Kolkata, 700 106, India.
Investigating magnetism in double double perovskites reveals a balance between double exchange and super-exchange mechanisms. These materials show potential for spintronics due to large magnetic moments and half-metallic properties.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid State Chemistry
Background:
- Understanding complex magnetism in multi-sublattice systems is challenging due to intricate magnetic exchange interactions.
- Recent synthesis of AA[Formula: see text]BB[Formula: see text]O[Formula: see text] double double perovskites offers a new platform to study these phenomena.
Purpose of the Study:
- To investigate the magnetic behavior mechanisms in AA[Formula: see text]BB[Formula: see text]O[Formula: see text] double double perovskites.
- To elucidate the interplay between different magnetic exchange mechanisms governing magnetism.
Main Methods:
- First-principles calculations to derive the spin Hamiltonian.
- Classical Monte Carlo simulations to solve the spin Hamiltonian and reproduce magnetic properties.
Main Results:
- Magnetism is governed by a balance between double exchange and super-exchange mechanisms.
- Calculations successfully reproduce observed magnetic properties.
- Influence of off-stoichiometry on magnetic behavior is analyzed.
Conclusions:
- Double double perovskites exhibit complex magnetism driven by competing exchange interactions.
- Some compounds are half-metallic with large magnetic moments and high transition temperatures.
- These materials hold promise for spintronics and memory device applications.
More Related Videos
06:49Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
Published on: April 12, 2019
08:49Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films
Published on: December 4, 2014
Related Concept Videos
02:42Valence Bond Theory
03:02Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
02:58Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
01:31Ferromagnetism
01:13¹H NMR: Complex Splitting
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...