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Title: Spin reorientation and Ce-Mn coupling in antiferromagnetic oxypnictide CeMnAsO

Abstract

In this paper, we investigate the structure and magnetic properties of high-quality polycrystalline CeMnAsO, a parent compound of the “1111”-type oxypnictides using neutron powder diffraction and magnetization measurements. We find that CeMnAsO undergoes a C-type antiferromagnetic order with Mn2+(S=5/2) moments pointing along the c axis below a relatively high Néel temperature of TN=347(1) K. Below TSR=35 K, two simultaneous transitions occur where the Mn moments reorient from the c axis to the ab plane preserving the C-type magnetic order, and Ce moments undergo long-range AFM ordering with antiparallel moments pointing in the ab plane. Another transition to a noncollinear magnetic structure occurs below 7 K. The ordered moments of Mn and Ce at 2 K are 3.32(4) μB and 0.81(4)μB, respectively. We find that CeMnAsO primarily falls into the category of a local-moment antiferromagnetic insulator in which the nearest-neighbor interaction (J1) is dominant with J2<J1/2 in the context of J1-J2-Jc model. The spin reorientation transition driven by the coupling between Ce and the transition metal seems to be common to Mn, Fe, and Cr ions, but not to Co and Ni ions in the isostructural oxypnictides. Also, a schematic illustration of magnetic structures in Mn and Ce sublattices in CeMnAsOmore » is presented.« less

Authors:
 [1];  [2];  [1];  [3];  [1]
  1. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Ames Lab., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1227212
Alternate Identifier(s):
OSTI ID: 1180589; OSTI ID: 1265331
Report Number(s):
IS-J-8631
Journal ID: ISSN 1098-0121; PRBMDO
Grant/Contract Number:  
AC02-07CH11358; AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 6; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Zhang, Qiang, Tian, Wei, Peterson, Spencer G., Dennis, Kevin W., and Vaknin, David. Spin reorientation and Ce-Mn coupling in antiferromagnetic oxypnictide CeMnAsO. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.91.064418.
Zhang, Qiang, Tian, Wei, Peterson, Spencer G., Dennis, Kevin W., & Vaknin, David. Spin reorientation and Ce-Mn coupling in antiferromagnetic oxypnictide CeMnAsO. United States. https://doi.org/10.1103/PhysRevB.91.064418
Zhang, Qiang, Tian, Wei, Peterson, Spencer G., Dennis, Kevin W., and Vaknin, David. Wed . "Spin reorientation and Ce-Mn coupling in antiferromagnetic oxypnictide CeMnAsO". United States. https://doi.org/10.1103/PhysRevB.91.064418. https://www.osti.gov/servlets/purl/1227212.
@article{osti_1227212,
title = {Spin reorientation and Ce-Mn coupling in antiferromagnetic oxypnictide CeMnAsO},
author = {Zhang, Qiang and Tian, Wei and Peterson, Spencer G. and Dennis, Kevin W. and Vaknin, David},
abstractNote = {In this paper, we investigate the structure and magnetic properties of high-quality polycrystalline CeMnAsO, a parent compound of the “1111”-type oxypnictides using neutron powder diffraction and magnetization measurements. We find that CeMnAsO undergoes a C-type antiferromagnetic order with Mn2+(S=5/2) moments pointing along the c axis below a relatively high Néel temperature of TN=347(1) K. Below TSR=35 K, two simultaneous transitions occur where the Mn moments reorient from the c axis to the ab plane preserving the C-type magnetic order, and Ce moments undergo long-range AFM ordering with antiparallel moments pointing in the ab plane. Another transition to a noncollinear magnetic structure occurs below 7 K. The ordered moments of Mn and Ce at 2 K are 3.32(4) μB and 0.81(4)μB, respectively. We find that CeMnAsO primarily falls into the category of a local-moment antiferromagnetic insulator in which the nearest-neighbor interaction (J1) is dominant with J2<J1/2 in the context of J1-J2-Jc model. The spin reorientation transition driven by the coupling between Ce and the transition metal seems to be common to Mn, Fe, and Cr ions, but not to Co and Ni ions in the isostructural oxypnictides. Also, a schematic illustration of magnetic structures in Mn and Ce sublattices in CeMnAsO is presented.},
doi = {10.1103/PhysRevB.91.064418},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 6,
volume = 91,
place = {United States},
year = {Wed Feb 18 00:00:00 EST 2015},
month = {Wed Feb 18 00:00:00 EST 2015}
}

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Works referencing / citing this record:

Influence of magnetism on Dirac semimetallic behavior in nonstoichiometric Sr 1 y Mn 1 z Sb 2 ( y 0.07 , z 0.02 )
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Short- and long-range magnetic order in LaMnAsO
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