skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Two-dimensional nanoscale correlations in the strong negative thermal expansion material ScF 3

Journal Article · · Physical Review B

We present diffuse x-ray scattering data on the strong negative thermal expansion (NTE) material ScF3 and find that two-dimensional nanoscale correlations exist at momentum-space regions associated with possibly rigid rotations of the perovskite octahedra. We address the extent to which rigid octahedral motion describes the dynamical fluctuations behind NTE by generalizing a simple model supporting a single floppy mode that is often used to heuristically describe instances of NTE. We find this model has tendencies toward dynamic inhomogeneities and its application to recent and existing experimental data suggest an intricate link between the nanometer correlation length scale, the energy scale for octahedral tilt fluctuations, and the coefficient of thermal expansion in ScF3. We then investigate the breakdown of the rigid limit and propose a resolution to an outstanding debate concerning the role of molecular rigidity in strong NTE materials.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1393186
Journal Information:
Physical Review B, Vol. 94, Issue 21; ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

References (29)

Two Decades of Negative Thermal Expansion Research: Where Do We Stand? journal June 2012
The determination of rigid-unit modes as potential soft modes for displacive phase transitions in framework crystal structures journal September 1993
Negative thermal expansion: a review journal July 2009
Large Negative Thermal Expansion and Anomalous Behavior on Compression in Cubic ReO 3 -Type A II B IV F 6 : CaZrF 6 and CaHfF 6 journal May 2015
A system with adjustable positive or negative thermal expansion
  • Grima, Joseph N.; Farrugia, Pierre S.; Gatt, Ruben
  • Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 463, Issue 2082 https://doi.org/10.1098/rspa.2007.1841
journal March 2007
Toward an Understanding of the Local Origin of Negative Thermal Expansion in ZrW 2 O 8 : Limits and Inconsistencies of the Tent and Rigid Unit Mode Models journal June 2014
Geometrical frustration, spin ice and negative thermal expansion – the physics of underconstraint journal May 2000
Elasticity and Response in Nearly Isostatic Periodic Lattices journal November 2009
The role of rigid unit modes in negative thermal expansion journal July 2003
Negative Thermal Expansion in ZrW 2 O 8 : Mechanisms, Rigid Unit Modes, and Neutron Total Scattering journal December 2005
Soft Modes and Elasticity of Nearly Isostatic Lattices: Randomness and Dissipation journal February 2010
Dynamics of Some Constrained Lattices journal February 2001
Surface phonons, elastic response, and conformal invariance in twisted kagome lattices journal June 2012
Elastic properties of a class of solids with negative thermal expansion journal July 2010
Octahedral Tilting in Perovskites. I. Geometrical Considerations journal February 1997
Frustrated Soft Modes and Negative Thermal Expansion in Z r W 2 O 8 journal November 2002
Structural Relationship between Negative Thermal Expansion and Quartic Anharmonicity of Cubic ScF 3 journal November 2011
Pronounced Negative Thermal Expansion from a Simple Structure: Cubic ScF 3 journal November 2010
The Ginzburg interval in soft-mode phase transitions: consequences of the rigid unit mode picture journal April 1994
Classical model of negative thermal expansion in solids with expanding bonds journal June 2016
Octahedral tilt instability of ReO 3 -type crystals journal May 2006
Interpretation of unexpected behavior of infrared absorption spectra of ScF 3 beyond the quasiharmonic approximation journal June 2016
Negative thermal expansion materials: technological key for control of thermal expansion journal February 2012
Negative thermal expansion of ScF 3 : Insights from density-functional molecular dynamics in the isothermal-isobaric ensemble journal December 2015
Soft Manifold Dynamics behind Negative Thermal Expansion journal June 2008
Simulation studies of at high pressure journal September 1998
Colossal negative thermal expansion in BiNiO3 induced by intermetallic charge transfer journal June 2011
Large isotropic negative thermal expansion above a structural quantum phase transition journal October 2015
New Insights into the Negative Thermal Expansion: Direct Experimental Evidence for the “Guitar-String” Effect in Cubic ScF 3 journal June 2016

Similar Records

Giant negative thermal expansion at the nanoscale in the multifunctional material Gd5(Si,Ge)4
Journal Article · Mon Oct 07 00:00:00 EDT 2019 · Physical Review B · OSTI ID:1393186

Negative thermal expansion and magnetoelastic coupling in the breathing pyrochlore lattice material LiGaCr4S8
Journal Article · Mon Apr 30 00:00:00 EDT 2018 · Physical Review B · OSTI ID:1393186

New insights into the negative thermal expansion: Direct experimental evidence for the “guitar-string” effect in cubic ScF3
Journal Article · Thu Jun 23 00:00:00 EDT 2016 · Journal of the American Chemical Society · OSTI ID:1393186

Related Subjects