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

Title: Antiferromagnetic and Orbital Ordering on a Diamond Lattice Near Quantum Criticality

Journal Article · · Physical Review. X

Here, we present neutron scattering measurements on powder samples of the spinel FeSc 2 S 4 that reveal a previously unobserved magnetic ordering transition occurring at 11.8(2) K. Magnetic ordering occurs subsequent to a subtle cubic-to-tetragonal structural transition that distorts Fe coordinating sulfur tetrahedra and lifts the orbital degeneracy. Furthermore, the orbital ordering is not truly long ranged, but occurs over finite-sized domains that limit magnetic correlation lengths. During the application of 1 GPa hydrostatic pressure appears to destabilize this Néel state, reducing the transition temperature to 8.6(8) K and redistributing magnetic spectral weight to higher energies. The relative magnitudes of ordered 2= 3.1(2) μ$$2\atop{B}$$ and fluctuating moments < δm >= 13(1) μ$$2\atop{B}$$ show that the magnetically ordered state of FeSc 2 S 4 is drastically renormalized and close to criticality.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357; FG02-08ER46544; AC05-00OR22725
OSTI ID:
1336888
Alternate ID(s):
OSTI ID: 1341577
Journal Information:
Physical Review. X, Journal Name: Physical Review. X Vol. 6 Journal Issue: 4; ISSN 2160-3308
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

References (45)

Orbital physics in sulfur spinels: ordered, liquid and glassy ground states journal January 2004
Quantum Order by Disorder in Frustrated Diamond Lattice Antiferromagnets journal July 2008
Singlet-Triplet Excitations and Long-Range Entanglement in the Spin-Orbital Liquid Candidate FeSc 2 S 4 journal May 2015
Local Spin Resonance and Spin-Peierls-like Phase Transition in a Geometrically Frustrated Antiferromagnet journal April 2000
Spin liquids in frustrated magnets journal March 2010
Experimental evidence of a collinear antiferromagnetic ordering in the frustrated CoAl 2 O 4 spinel journal November 2013
Vibronic and Magnetic Excitations in the Spin-Orbital Liquid State of FeSc 2 S 4 journal June 2005
Theory of excitations and dielectric response at a spin-orbital quantum critical point journal September 2015
Magnetic ordering in the frustrated system FeSc2S4 journal October 2008
Spin Dynamics and Orbital State in LaTiO 3 journal October 2000
Order-by-disorder and spiral spin-liquid in frustrated diamond-lattice antiferromagnets journal May 2007
Frustrated three-dimensional quantum spin liquid in CuHpCl journal January 2002
Spin Glass Order by Antisite Disorder in the Highly Frustrated Spinel Oxide CoAl 2 O 4 journal February 2013
Spin-Orbital Short-Range Order on a Honeycomb-Based Lattice journal May 2012
Growth and characterization of iron scandium sulfide (FeSc2S4) journal November 2016
Sum rules for the frequency spectrum of linear magnetic chains journal July 1974
Magnetic ordering and spin excitations in the frustrated magnet Mn Sc 2 S 4 journal January 2006
Spin-Orbital Quantum Liquid on the Honeycomb Lattice journal November 2012
Approaching the true ground state of frustrated A -site spinels: A combined magnetization and polarized neutron scattering study journal May 2014
Comparative study of FeCr 2 S 4 and FeSc 2 S 4 : Spinels with orbitally active A site journal July 2010
Phenomenological model of anisotropic peak broadening in powder diffraction journal April 1999
Quantum Melting of Magnetic Order due to Orbital Fluctuations journal April 1997
The Jahn-Teller effect and magnetism: transition metal compounds journal April 1982
Spin-orbiton and quantum criticality in FeSc 2 S 4 journal March 2015
Kinetically inhibited order in a diamond-lattice antiferromagnet journal September 2011
A new protocol for the determination of magnetic structures using simulated annealing and representational analysis (SARAh) journal March 2000
Spin-Orbital Singlet and Quantum Critical Point on the Diamond Lattice: FeSc 2 S 4 journal March 2009
A Monte Carlo study of the first-order transition in a Heisenberg FCC antiferromagnet journal March 2005
Orbital Liquid in Three-Dimensional Mott Insulator: LaTiO 3 journal October 2000
Excitation spectrum and magnetic field effects in a quantum critical spin-orbital system: The case of FeSc 2 S 4 journal December 2009
Structural anomalies and the orbital ground state in FeCr 2 S 4 journal May 2010
Theory of the ordered phase in A -site antiferromagnetic spinels journal October 2008
Spin and Orbital Frustration in MnSc 2 S 4 and FeSc 2 S 4 journal March 2004
DISTRIBUTION OF STRAINS AT Fe 2+ A SITE IN THE THIOSPINEL FeSc 2 S 4 journal December 1976
Linear spin wave theory for single-Q incommensurate magnetic structures journal March 2015
Less than 50% sublattice polarization in an insulating S = 3 2 kagomé antiferromagnet at T 0 journal October 1997
Spin excitations in frustrated A -site spinels investigated with inelastic neutron scattering journal April 2009
Impurity effects in highly frustrated diamond-lattice antiferromagnets journal August 2011
An End to the Drought of Quantum Spin Liquids journal September 2008
Spin and orbital frustration in FeSc 2 S 4 probed by Sc 45 NMR journal April 2006
The new cold neutron chopper spectrometer at the Spallation Neutron Source: Design and performance journal August 2011
Dynamic stripes and resonance in the superconducting and normal phases of YBa 2 Cu 3 O 6.5 ortho-II superconductor journal January 2004
Structural investigations of the compounds ASc2S4 (A=Mn, Fe, Cd) journal February 2002
Frustration-induced two-dimensional quantum disordered phase in piperazinium hexachlorodicuprate journal September 2001
Orbital Frustration and Resonating Valence Bond State in the Spin-1/2 Triangular Lattice LiNiO 2 journal November 1998