Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Anisotropy of the magnetic and transport properties of EuZn2 As2

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [4];  [5];  [5];  [6];  [7];  [7];  [8];  [9];  [9];  [4];  [2];  [5]
  1. Boston College, Chestnut Hill, MA (United States); Stanford University
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Stanford Univ., CA (United States)
  3. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research; Univ. of Maryland, College Park, MD (United States)
  4. Howard Univ., Washington, DC (United States); Howard Univ., Washington, DC (United States). IBM-Howard Quantum Center
  5. Boston College, Chestnut Hill, MA (United States)
  6. Paul Scherrer Inst., Villigen (Switzerland). Lab. for Neutron Scattering and Imaging
  7. Westlake Inst. for Advanced Study, Hangzhou (China); Westlake Inst. for Advanced Study, Hangzhou (China). Inst. of Natural Sciences
  8. Stanford Univ., CA (United States)
  9. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
+ Show Author Affiliations
Several recent studies have shown that the anisotropy in the magnetic structure of EuCd2As2 plays a significant role in stabilizing the Weyl nodes. Therefore, to investigate the relationship between magnetic anisotropy and Weyl physics, we present a comparative study between EuZn2As2 and EuCd2As2 that are isostructural but with different magnetic anisotropy. We performed structural analysis, electronic transport, and magnetization experiments on millimeter-sized single crystals of EuZn2As2, and compared the results to those of EuCd2As2. By combining the first principle calculations and neutron diffraction experiment, we identify the magnetic ground state of EuZn2As2 as A-type antiferromagnetic order with a transition temperature (T_N = 19.6 K) twice that of EuCd2As2. Like EuCd2As2, the negative magnetoresistance of EuZn2As2 is observed after suppressing the resistivity peak at T_N with increasing fields. However, the anisotropy in both transport and magnetization are much reduced in EuZn2As2. The difference could be ascribed to the weaker spin-orbit coupling, more localized d orbitals, and a larger contribution from the Eu s orbitals in the zinc compound, as suggested by the electronic band calculations. The same band structure effect could be also responsible for the observation of a smaller nonlinear anomalous Hall effect in EuZn2As2 compared to EuCd2As2.
Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
US Air Force Office of Scientific Research (AFOSR); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1869465
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 16 Vol. 105; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (38)

Emergence of Nontrivial Low‐Energy Dirac Fermions in Antiferromagnetic EuCd 2 As 2 journal April 2020
Colossal Magnetoresistance without Mixed Valence in a Layered Phosphide Crystal journal January 2021
Recent advances in magnetic structure determination by neutron powder diffraction journal October 1993
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
A new protocol for the determination of magnetic structures using simulated annealing and representational analysis (SARAh) journal March 2000
Colossal Magnetoresistance in a Rare Earth Zintl Compound with a New Structure Type:  EuIn 2 P 2 journal January 2006
Colossal Magnetoresistance in the Transition-Metal Zintl Compound Eu 14 MnSb 11 journal December 1997
Magnetic Properties and Negative Colossal Magnetoresistance of the Rare Earth Zintl phase EuIn 2 As 2 journal December 2008
Colossal magnetoresistance in Cr-based chalcogenide spinels journal March 1997
Accurate first-principles structures and energies of diversely bonded systems from an efficient density functional journal June 2016
Large anomalous Hall effect in a half-Heusler antiferromagnet journal July 2016
Nucleation and annihilation of skyrmions in Mn2CoAl observed through the topological Hall effect journal October 2017
Single parabolic band transport in p-type EuZn 2 Sb 2 thermoelectrics journal January 2017
Large anisotropic topological Hall effect in a hexagonal non-collinear magnet Fe 5 Sn 3 journal May 2020
Ideal Weyl semimetal induced by magnetic exchange journal November 2019
Resonant x-ray scattering study of diffuse magnetic scattering from the topological semimetals EuCd 2 As 2 and EuCd 2 Sb 2 journal July 2020
Field-induced magnetic phase transitions and the resultant giant anomalous Hall effect in the antiferromagnetic half-Heusler compound DyPtBi journal September 2020
Ab initiomolecular dynamics for liquid metals journal January 1993
Ab initio molecular-dynamics simulation of the liquid-metal–amorphous-semiconductor transition in germanium journal May 1994
Spin-polarized photoemission studies of the exchange splitting of the Gd 5 d electrons near the Curie temperature journal May 1995
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Electron-energy-loss spectra and the structural stability of nickel oxide: An LSDA+U study journal January 1998
Thermodynamic and transport properties of single-crystal Yb 14 MnSb 11 journal June 1999
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Anisotropic transport and optical spectroscopy study on antiferromagnetic triangular lattice EuCd 2 As 2 : An interplay between magnetism and charge transport properties journal July 2016
Coupling of magnetic order and charge transport in the candidate Dirac semimetal EuCd 2 As 2 journal June 2018
Single pair of Weyl fermions in the half-metallic semimetal EuC d 2 A s 2 journal June 2019
Topological Hall Effect in the A Phase of MnSi journal May 2009
Large Topological Hall Effect in a Short-Period Helimagnet MnGe journal April 2011
Strongly Constrained and Appropriately Normed Semilocal Density Functional journal July 2015
Higher-Order Topology of the Axion Insulator EuIn 2 As 2 journal June 2019
Band Structure and Magnetism of Gadolinium Metal journal December 1964
Superconductivity in Bad Metals journal April 1995
Low Temperature Magnetoresistance and the Magnetic Phase Diagram of La 1 − x Ca x MnO 3 journal October 1995
Generalized Gradient Approximation Made Simple journal October 1996
Giant positive magnetoresistance in half-metallic double-perovskite Sr 2 CrWO 6 thin films journal November 2017
Spin fluctuation induced Weyl semimetal state in the paramagnetic phase of EuCd 2 As 2 journal July 2019
Colossal Magnetoresistance Without Mn3+/Mn4+ Double Exchange in the Stoichiometric Pyrochlore Tl2Mn2O7 journal July 1996

Similar Records

Observation of paramagnetic spin-degeneracy lifting in EuZn2Sb2
Journal Article · Mon Jul 15 20:00:00 EDT 2024 · Physical Review. B · OSTI ID:2428951
A -type antiferromagnetic order in the Zintl-phase insulator EuZn2P2
Journal Article · Tue Aug 16 20:00:00 EDT 2022 · Physical Review. B · OSTI ID:1979797
Unraveling the structural dependency of Weyl nodes in Co2MnGa
Journal Article · Thu Aug 08 20:00:00 EDT 2024 · Physical Review. B · OSTI ID:2434346

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Anomalous Hall effect
Fermi surface
density of states
electrical conductivity
electronic structure
first-principles calculations
layered crystals
magnetic anisotropy
magnetic order
magnetic susceptibility
spin-orbit coupling