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Related Concept Videos

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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...
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Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
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Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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Color in Coordination Complexes
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Related Experiment Video

Updated: Apr 8, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Supercooled spin liquid state in the frustrated pyrochlore Dy2Ti2O7.

Ethan R Kassner1, Azar B Eyvazov1, Benjamin Pichler2

  • 1Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, NY 14853;

Proceedings of the National Academy of Sciences of the United States of America
|July 2, 2015
PubMed
Summary
This summary is machine-generated.

Researchers discovered that Dy2Ti2O7 acts as a supercooled magnetic liquid. This finding suggests a potential evolution toward an exotic magnetic glass state, driven by frustrated magnetic interactions.

Keywords:
magnetic dynamicsperiodic boundariesspin liquidsupercooled liquids

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Area of Science:

  • Condensed Matter Physics
  • Magnetism
  • Materials Science

Background:

  • Supercooled liquids exhibit unique properties when cooling prevents crystallization.
  • Classic supercooled liquids show characteristic relaxation dynamics (Vogel-Tammann-Fulcher, Havriliak-Negami, Kohlrausch-Williams-Watts).
  • The pyrochlore Dy2Ti2O7 has shown potential for exotic magnetic fluid behavior due to frustrated magnetic interactions.

Purpose of the Study:

  • To investigate the low-temperature magnetic state of Dy2Ti2O7.
  • To understand the time- and frequency-dependent magnetization dynamics.
  • To determine if Dy2Ti2O7 exhibits characteristics of a supercooled magnetic liquid.

Main Methods:

  • Development of high-precision, boundary-free magnetization transport techniques.
  • Utilizing toroidal geometries for magnetization measurements.
  • Analysis of magnetic susceptibility and real-time magnetic relaxation.

Main Results:

  • Demonstrated a universal Havriliak-Negami (HN) form for magnetic susceptibility.
  • Observed a general Kohlrausch-Williams-Watts (KWW) form for real-time magnetic relaxation.
  • Confirmed a Vogel-Tammann-Fulcher (VTF) trajectory for microscopic magnetic relaxation rates.

Conclusions:

  • Low-temperature Dy2Ti2O7 exhibits key characteristics of a supercooled magnetic liquid.
  • The material may be transitioning towards a novel magnetic glass state.
  • This behavior could be linked to many-body localization of spins.