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Related Concept Videos

Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

23.7K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
23.7K
Metallic Solids02:37

Metallic Solids

18.2K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.2K
Valence Bond Theory02:42

Valence Bond Theory

8.5K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.5K
Colors and Magnetism03:02

Colors and Magnetism

11.5K
Color in Coordination Complexes
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...
11.5K
Ionic Crystal Structures02:42

Ionic Crystal Structures

14.1K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.1K
Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

9.5K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
9.5K

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Related Experiment Video

Updated: Jun 4, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

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Rare-Earth Iron Garnet Superlattices with Sub-unit Cell Composition Modulation.

Bharat Khurana1, Allison C Kaczmarek1, Chung-Tao Chou2,3

  • 1Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

ACS Nano
|December 18, 2024
PubMed
Summary

We synthesized novel garnet superlattices with ultrathin layers, revealing unique magnetic properties distinct from solid solutions. These findings open new avenues for interface physics in complex oxide materials.

Keywords:
ferrimagnetiron garnetmagnetic anisotropymultilayerpulsed laser depositionsuperlattice

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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates

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Fabrication of Spatially Confined Complex Oxides
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Fabrication of Spatially Confined Complex Oxides

Published on: July 1, 2013

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Related Experiment Videos

Last Updated: Jun 4, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates

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Fabrication of Spatially Confined Complex Oxides
08:45

Fabrication of Spatially Confined Complex Oxides

Published on: July 1, 2013

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Solid State Chemistry

Background:

  • Oxide superlattices exhibit emergent properties at interfaces due to structural and electronic modifications.
  • Perovskite superlattices have been extensively studied, yielding phenomena like 2D electron gases and novel magnetic/ferroelectric behaviors.
  • Garnets, with their complex structure and diverse properties (ferrimagnetism, ion transport), are less explored in superlattice form.

Purpose of the Study:

  • To synthesize and characterize ultrathin garnet superlattices with layer thicknesses approaching the unit cell dimension.
  • To investigate the interfacial properties and emergent phenomena in these novel garnet-based heterostructures.
  • To explore the potential of garnet superlattices as a platform for advanced interface physics.

Main Methods:

  • Pulsed laser deposition for growing Bi and rare earth iron garnet (RE-IG) superlattices.
  • Atom probe tomography and transmission electron microscopy for structural and compositional analysis.
  • Magnetic property measurements, including perpendicular magnetic anisotropy and ferromagnetic resonance linewidth analysis.

Main Results:

  • Successfully synthesized garnet superlattices with layer thicknesses as low as 0.45 nm, significantly less than the unit cell.
  • Observed composition modulation without dislocations at the interfaces.
  • TmIG/TbIG superlattices showed perpendicular magnetic anisotropy, differing from solid solutions, while BiIG/LuIG superlattices displayed end-member characteristics in ferromagnetic resonance.

Conclusions:

  • Garnet superlattices can be fabricated with atomic layer control, enabling exploration of interface phenomena.
  • The unique structural complexity of garnets offers a rich parameter space for tuning interfacial magnetic and electronic properties.
  • These findings establish garnet superlattices as a promising new platform for fundamental research in oxide interface physics and materials design.