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Title: Short-range order in the quantum XXZ honeycomb lattice material BaCo 2 ( PO 4 ) 2

Journal Article · · Physical Review B
 [1];  [1];  [1];  [1];  [1]; ORCiD logo [2];  [3];  [4]
  1. Colorado State Univ., Fort Collins, CO (United States). Department of Physics
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
  3. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  4. Colorado State Univ., Fort Collins, CO (United States). Department of Physics; Canadian Institute for Advanced Research (CIFAR), Toronto, Ontario (Canada). Quantum Materials Program

In this paper, we present observations of highly frustrated quasi-two-dimensional (2D) magnetic correlations in the honeycomb lattice layers of the Seff =1/2 compound γ-BaCo2(PO4)2 (γ-BCPO). Specific heat shows a broad peak comprised of two weak kink features at TN1~6 K and TN2~3.5 K, the relative weights of which can be modified by sample annealing. Neutron powder diffraction measurements reveal short range quasi-2D order that is established below TN1 and TN2, at which two separate, incompatible, short range magnetic orders onset: commensurate antiferromagnetic correlations with correlation length ξc=60±2 Å (TN1) and in quasi-2D helical domains with ξh=350±11 Å (TN2). The ac magnetic susceptibility response lacks frequency dependence, ruling out spin freezing. Inelastic neutron scattering data on γ-BCPO is compared with linear spin wave theory, and two separate parameter regions of the XXZ J1-J2-J3 model with ferromagnetic nearest-neighbor exchange J1 are favored, both near regions of high classical degeneracy. High energy coherent excitations (~10 meV) persist up to at least 40 K, suggesting strong in-plane correlations persist above TN. Finally, these data show that γ-BCPO is a rare highly frustrated, quasi-2D Seff =1/2 honeycomb lattice material which resists long range magnetic order and spin freezing.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1435190
Alternate ID(s):
OSTI ID: 1432902
Journal Information:
Physical Review B, Vol. 97, Issue 13; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

References (39)

Classical Spin Liquid on the Maximally Frustrated Honeycomb Lattice journal October 2016
Pseudospin exchange interactions in d 7 cobalt compounds: Possible realization of the Kitaev model journal January 2018
Anyons in an exactly solved model and beyond journal January 2006
Intensity of diffracted intensities book October 2006
Magnetic properties of the honeycomb oxide Na 2 Co 2 TeO 6 journal December 2016
Structure and Magnetic Properties of Cu 3 Ni 2 SbO 6 and Cu 3 Co 2 SbO 6 Delafossites with Honeycomb Lattices journal April 2013
Gapless quantum spin liquid ground state in the spin-1 antiferromagnet 6HB- Ba 3 NiSb 2 O 9 journal June 2016
Investigation by spherical neutron polarimetry of magnetic properties in BaCo2(AsO4)2 journal November 2006
Structure and basic magnetic properties of the honeycomb lattice compounds Na2Co2TeO6 and Na3Co2SbO6 journal March 2007
Spin-Orbital Short-Range Order on a Honeycomb-Based Lattice journal May 2012
Structural domain and finite-size effects of the antiferromagnetic S = 1 / 2 honeycomb lattice in InCu 2 / 3 V 1 / 3 O 3 journal July 2008
An investigation of the quantum J 1 - J 2 - J 3 model on the honeycomb lattice journal March 2001
Quantum phases in the frustrated Heisenberg model on the bilayer honeycomb lattice journal January 2014
Barium Cobalt Phosphate, BaCo 2 (PO 4 ) 2 journal November 1998
Method for Determining Ground-State Spin Configurations journal December 1960
Excitations in KCoF 3 . II. Theoretical journal October 1971
Absence of Jahn−Teller transition in the hexagonal Ba 3 CuSb 2 O 9 single crystal journal July 2015
Magnetic ordering in a planar X - Y model: BaCo2(AsO4)2 journal January 1977
High-Pressure Sequence of Ba 3 NiSb 2 O 9 Structural Phases: New S = 1 Quantum Spin Liquids Based on Ni 2 + journal November 2011
The magnetic properties and structure of the quasi-two-dimensional antiferromagnet CoPS 3 journal October 2017
Polarized-neutron investigation of magnetic ordering and spin dynamics in BaCo 2 (AsO 4 ) 2 frustrated honeycomb-lattice magnet journal January 2018
Quantum disordered phase on the frustrated honeycomb lattice journal March 2011
Zigzag antiferromagnetic ground state with anisotropic correlation lengths in the quasi-two-dimensional honeycomb lattice compound N a 2 C o 2 Te O 6 journal March 2017
SPECIFIC HEAT OF THE QUASI 2D-XY HELIMAGNETS BaCo 2 (AsO 4 ) 2 AND BaCo 2 (PO 4 ) 2 journal August 1978
Structure and Magnetic Properties of the α-NaFeO 2 -Type Honeycomb Compound Na 3 Ni 2 BiO 6 journal November 2013
Zig-zag magnetic ordering in honeycomb-layered Na3Co2SbO6 journal November 2016
Disordered Ground State and Magnetic Field-Induced Long-Range Order in an S = 3 / 2 Antiferromagnetic Honeycomb Lattice Compound Bi 3 Mn 4 O 12 ( NO 3 ) journal October 2010
Randomness-Induced Quantum Spin Liquid Behavior in the s = 1/2 Random J 1J 2 Heisenberg Antiferromagnet on the Honeycomb Lattice journal April 2017
Single-ion properties of the S eff = 1 2 XY antiferromagnetic pyrochlores Na A Co 2 F 7 ( A = Ca 2 + ,   Sr 2 + ) journal April 2017
Linear spin wave theory for single-Q incommensurate magnetic structures journal March 2015
Puzzling Polymorphism of Layered Ba(CoPO 4 ) 2 journal July 2013
Exchange mixing and soliton dynamics in the quantum spin chain CsCoCl 3 journal December 1995
Non-simple magnetic order for simple Hamiltonians journal July 1979
Exotic disordered phases in the quantum J 1 - J 2 model on the honeycomb lattice journal January 2013
X-Ray Diffraction in Random Layer Lattices journal May 1941
Spin-glass behavior in a three-dimensional antiferromagnet ordered phase: Magnetic structure of Co 2 ( OH ) ( PO 4 ) journal September 2002
The cold neutron chopper spectrometer at the Spallation Neutron Source—A review of the first 8 years of operation journal September 2016
Magnetic properties of pure and diamagnetically doped jarosites: Model kagomé antiferromagnets with variable coverage of the magnetic lattice journal March 2000
A new high pressure form of Ba3NiSb2O9 journal May 2016

Cited By (2)

Counterrotating magnetic order in the honeycomb layers of NaNi 2 BiO 6 δ journal December 2019
Weak-field induced nonmagnetic state in a Co-based honeycomb journal January 2020

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