Title: Canted Eu magnetic structure in EuMnSb2

Journal Article · · Physical Review B
 [1];  [2];  [3];  [2];  [2];  [2]; ORCiD logo [2]
  1. Louisiana State Univ., Baton Rouge, LA (United States); Louisiana State University
  2. Louisiana State Univ., Baton Rouge, LA (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
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Magnetic ordering breaks the time-reversal symmetry, greatly impacting material topological properties. Here, we report the investigation of the magnetic properties of the layered EuMnSb2, which has two sets of magnetic sublattices. Both the magnetization and electrical resistivity reveal two phase transitions with one at TN,Eu~21K and the other at TN,Mn~346K. Single crystal neutron diffraction refinement indicates that both transitions are originated from magnetic ordering. Below TN,Mn, the Mn sublattice forms the C-type antiferromagnetic (AFM) structure with moments [(4.5±0.6)μB at 7 K] pointing along the a axis. Below TN,Eu, the Eu sublattice forms the canted A-type AFM structure with moments [(5.9±0.8)μB at 7 K] lying in the ac plane but pointing (41 ± 1)° away from the a axis. Quantitative analysis indicates that the spin-spin correlation length, while anisotropic, has long-range characteristic in all directions for both the Eu and Mn sublattices.

Research Organization:
Louisiana State Univ., Baton Rouge, LA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; SC0012432
OSTI ID:
1674967
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 22 Vol. 101; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (28)

Recent advances in magnetic structure determination by neutron powder diffraction journal October 1993
Critical phenomena and renormalization-group theory journal October 2002
A new protocol for the determination of magnetic structures using simulated annealing and representational analysis (SARAh) journal March 2000
A magnetic topological semimetal Sr1−yMn1−zSb2 (y, z < 0.1) journal July 2017
Dirac fermions in an antiferromagnetic semimetal journal August 2016
Time-reversal symmetry breaking type-II Weyl state in YbMnBi2 journal July 2019
Strong Anisotropy of Dirac Cones in SrMnBi2 and CaMnBi2 Revealed by Angle-Resolved Photoemission Spectroscopy journal June 2014
Nontrivial Berry phase in magnetic BaMnSb 2 semimetal journal May 2017
Temperature dependence of the resistivity due to localized spin fluctuations. II. Coles alloys journal September 1972
AEMnSb 2 (AE=Sr, Ba): a new class of Dirac materials journal January 2014
Magnetic and electronic structure of Dirac semimetal candidate EuMnSb 2 journal November 2019
Influence of magnetism on Dirac semimetallic behavior in nonstoichiometric Sr 1 − y Mn 1 − z Sb 2 ( y ∼ 0.07 , z ∼ 0.02 ) journal November 2019
Effects of spin fluctuations on the resistivity of metallic glasses journal April 1994
Layered transition-metal pnictide SrMnBi 2 with metallic blocking layer journal August 2011
Two-dimensional Dirac fermions and quantum magnetoresistance in CaMnBi 2 journal January 2012
Anisotropic Dirac electronic structures of A MnBi 2 ( A = Sr ,Ca) journal June 2013
Effect of Eu magnetism on the electronic properties of the candidate Dirac material EuMnBi 2 journal August 2014
Electron-hole asymmetry, Dirac fermions, and quantum magnetoresistance in BaMnBi 2 journal March 2016
Magnetotransport study of Dirac fermions in YbMnBi 2 antiferromagnet journal October 2016
Large negative magnetoresistance of a nearly Dirac material: Layered antimonide EuMnS b 2 journal November 2017
Impact of antiferromagnetic order on Landau-level splitting of quasi-two-dimensional Dirac fermions in EuMnBi 2 journal October 2018
Crystal growth, microstructure, and physical properties of SrMnSb 2 journal February 2019
Order Parameter Criticality of the d = 3 Random-Field Ising Antiferromagnet F e 0.85 Z n 0.15 F 2 journal September 2002
Weyl and Dirac semimetals in three-dimensional solids journal January 2018
Expanding Lorentz and spectrum corrections to large volumes of reciprocal space for single-crystal time-of-flight neutron diffraction journal March 2016
Implementation of cross correlation for energy discrimination on the time-of-flight spectrometer CORELLI journal March 2018
Quantum Hall effect in a bulk antiferromagnet EuMnBi 2 with magnetically confined two-dimensional Dirac fermions journal January 2016
Magnetotransport in Layered Dirac Fermion System Coupled with Magnetic Moments journal March 2018

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