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Title: Anomalous Composition-Induced Crossover in the Magnetic Properties of the Itinerant-Electron Antiferromagnet Ca 1 - x Sr x Co 2 - y As 2

Abstract

We report the inference of Ying et al. [Europhys. Lett. 104, 67005 (2013)] of a composition-induced change from c-axis ordered-moment alignment in a collinear A-type antiferromagnetic (AFM) structure at small x to ab-plane alignment in an unknown AFM structure at larger x in Ca 1-xSr xCo 2-yAs 2 with the body-centered tetragonal ThCr 2Si 2 structure is confirmed. Our major finding is an anomalous magnetic behavior in the crossover region 0.2 ≲ x ≲ 0.3 between these two phases. Also, in this region the magnetic susceptibility vs temperature χ ab(T) measured with magnetic fields H applied in the ab plane exhibit typical AFM behaviors with cusps at the Néel temperatures of ~ 65 K, whereas χ c(T) and the low-temperature isothermal magnetization M c(H) with H aligned along the c axis exhibit extremely soft ferromagneticlike behaviors.

Authors:
 [1];  [2];  [2];  [3]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States). Department of Materials Science and Engineering
  3. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States). Department of Physics and Astronomy
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE
OSTI Identifier:
1417345
Alternate Identifier(s):
OSTI ID: 1414334
Report Number(s):
IS-J-9486
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US1801033
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 119; Journal Issue: 25; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Sangeetha, N. S., Smetana, V., Mudring, A. -V., and Johnston, D. C. Anomalous Composition-Induced Crossover in the Magnetic Properties of the Itinerant-Electron Antiferromagnet Ca1-xSrxCo2-yAs2. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.119.257203.
Sangeetha, N. S., Smetana, V., Mudring, A. -V., & Johnston, D. C. Anomalous Composition-Induced Crossover in the Magnetic Properties of the Itinerant-Electron Antiferromagnet Ca1-xSrxCo2-yAs2. United States. doi:10.1103/PhysRevLett.119.257203.
Sangeetha, N. S., Smetana, V., Mudring, A. -V., and Johnston, D. C. Wed . "Anomalous Composition-Induced Crossover in the Magnetic Properties of the Itinerant-Electron Antiferromagnet Ca1-xSrxCo2-yAs2". United States. doi:10.1103/PhysRevLett.119.257203. https://www.osti.gov/servlets/purl/1417345.
@article{osti_1417345,
title = {Anomalous Composition-Induced Crossover in the Magnetic Properties of the Itinerant-Electron Antiferromagnet Ca1-xSrxCo2-yAs2},
author = {Sangeetha, N. S. and Smetana, V. and Mudring, A. -V. and Johnston, D. C.},
abstractNote = {We report the inference of Ying et al. [Europhys. Lett. 104, 67005 (2013)] of a composition-induced change from c-axis ordered-moment alignment in a collinear A-type antiferromagnetic (AFM) structure at small x to ab-plane alignment in an unknown AFM structure at larger x in Ca1-xSrxCo2-yAs2 with the body-centered tetragonal ThCr2Si2 structure is confirmed. Our major finding is an anomalous magnetic behavior in the crossover region 0.2 ≲ x ≲ 0.3 between these two phases. Also, in this region the magnetic susceptibility vs temperature χab(T) measured with magnetic fields H applied in the ab plane exhibit typical AFM behaviors with cusps at the Néel temperatures of ~ 65 K, whereas χc(T) and the low-temperature isothermal magnetization Mc(H) with H aligned along the c axis exhibit extremely soft ferromagneticlike behaviors.},
doi = {10.1103/PhysRevLett.119.257203},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 25,
volume = 119,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 2 works
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Figures / Tables:

FIG. 1 FIG. 1: (Colour online) Zero-field-cooled magnetic susceptibility χ of Ca1-xSrxCo2-yAs2 crystals versus T in H = 0.1 T applied in the ab plane (χab) and along the c axis (χc). Note the large changes in the ordinate scales versus x.

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