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Title: Charge density wave behavior and order-disorder in the antiferromagnetic metallic series Eu( Ga 1 - x Al x ) 4

Abstract

The solid solution Eu(Ga1-xAlx)4 was grown in single crystal form to reveal a rich variety of crystallographic, magnetic, and electronic properties that differ from the isostructural end compounds EuGa4 and EuAl4, despite the similar covalent radii and electronic configurations of Ga and Al. In this work we present the onset of magnetic spin reorientation and metamagnetic transitions for x=0-1 evidenced by magnetization and temperature-dependent specific heat measurements. TN changes nonmonotonously with x, and it reaches a maximum around 20 K for x=0.50, where the a lattice parameter also reflects an extreme (minimum) value. Anomalies in the temperature-dependent resistivity consistent with charge density wave behavior exist only for x=0.50 and 1. Density functional theory calculations show increased polarization between the Ga-Al covalent bonds in the x=0.50 structure compared to the end compounds, such that crystallographic order and chemical pressure are proposed as the causes of the charge density wave behavior.

Authors:
 [1];  [2];  [3];  [4];  [2];  [1];  [1]
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  1. Rice Univ., Houston, TX (United States)
  2. Univ. of California, Davis, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Johns Hopkins Univ., Baltimore, MD (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
OSTI Identifier:
1505519
Alternate Identifier(s):
OSTI ID: 1438515
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 19; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Stavinoha, Macy, Cooley, Joya A., Minasian, Stefan G., McQueen, Tyrel M., Kauzlarich, Susan M., Huang, C. -L., and Morosan, E. Charge density wave behavior and order-disorder in the antiferromagnetic metallic series Eu(Ga1-xAlx)4. United States: N. p., 2018. Web. doi:10.1103/physrevb.97.195146.
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Stavinoha, Macy, Cooley, Joya A., Minasian, Stefan G., McQueen, Tyrel M., Kauzlarich, Susan M., Huang, C. -L., & Morosan, E. Charge density wave behavior and order-disorder in the antiferromagnetic metallic series Eu(Ga1-xAlx)4. United States. https://doi.org/10.1103/physrevb.97.195146
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Stavinoha, Macy, Cooley, Joya A., Minasian, Stefan G., McQueen, Tyrel M., Kauzlarich, Susan M., Huang, C. -L., and Morosan, E. Wed . "Charge density wave behavior and order-disorder in the antiferromagnetic metallic series Eu(Ga1-xAlx)4". United States. https://doi.org/10.1103/physrevb.97.195146. https://www.osti.gov/servlets/purl/1505519.
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@article{osti_1505519,
title = {Charge density wave behavior and order-disorder in the antiferromagnetic metallic series Eu(Ga1-xAlx)4},
author = {Stavinoha, Macy and Cooley, Joya A. and Minasian, Stefan G. and McQueen, Tyrel M. and Kauzlarich, Susan M. and Huang, C. -L. and Morosan, E.},
abstractNote = {The solid solution Eu(Ga1-xAlx)4 was grown in single crystal form to reveal a rich variety of crystallographic, magnetic, and electronic properties that differ from the isostructural end compounds EuGa4 and EuAl4, despite the similar covalent radii and electronic configurations of Ga and Al. In this work we present the onset of magnetic spin reorientation and metamagnetic transitions for x=0-1 evidenced by magnetization and temperature-dependent specific heat measurements. TN changes nonmonotonously with x, and it reaches a maximum around 20 K for x=0.50, where the a lattice parameter also reflects an extreme (minimum) value. Anomalies in the temperature-dependent resistivity consistent with charge density wave behavior exist only for x=0.50 and 1. Density functional theory calculations show increased polarization between the Ga-Al covalent bonds in the x=0.50 structure compared to the end compounds, such that crystallographic order and chemical pressure are proposed as the causes of the charge density wave behavior.},
doi = {10.1103/physrevb.97.195146},
journal = {Physical Review B},
number = 19,
volume = 97,
place = {United States},
year = {Wed May 23 00:00:00 EDT 2018},
month = {Wed May 23 00:00:00 EDT 2018}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/physrevb.97.195146
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Cited by: 15 works
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Figures / Tables:

FIG. 1 FIG. 1: Powder x-ray diffraction (black symbols) of a doped single crystal Eu(Ga1−$x$Al$x$)4 with $x$ = 0.49 indicates that this crystal (and all crystals in this doped series) crystallizes in the I4/$mmm$ space group with no significant flux inclusion or impurity phases. The red line is the diffraction pattern calculatedmore » from Rietveld refinement and the blue ticks are the calculated peak positions. The orange line is the difference between the measured points and the calculated diffraction. The left inset is a picture of a crystal with each square = 1 mm x 1 mm and the right inset shows the tetragonal crystal structure.« less
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    Figures / Tables found in this record:

    FIG. 1 (p. 4)figure
    FIG. 2 (p. 4)figure
    FIG. 3 (p. 5)figure
    FIG. 4 (p. 6)figure
    FIG. 5 (p. 6)figure
    FIG. 6 (p. 7)figure
    FIG. S1 (p. 9)figure
    FIG. S2 (p. 9)figure
    FIG. S3 (p. 9)figure
    TABLE S1 (p. 10)table
    TABLE S2 (p. 10)table
    TABLE S3 (p. 11)table
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