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Title: The influence of magnetic order on the magnetoresistance anisotropy of Fe1 + δxCuxTe

Abstract

In this study, e performed resistance measurements on $$\text{F}{{\text{e}}_{1+\delta -x}}$$ Cu x Te with $${{x}_{\text{EDX}}}\leqslant 0.06$$ in the presence of in-plane applied magnetic fields, revealing a resistance anisotropy that can be induced at a temperature far below the structural and magnetic zero-field transition temperatures. The observed resistance anisotropy strongly depends on the field orientation with respect to the crystallographic axes, as well as on the field-cooling history. Our results imply a correlation between the observed features and the low-temperature magnetic order. Hysteresis in the angle-dependence indicates a strong pinning of the magnetic order within a temperature range that varies with the Cu content. The resistance anisotropy vanishes at different temperatures depending on whether an external magnetic field or a remnant field is present: the closing temperature is higher in the presence of an external field. For $${{x}_{\text{EDX}}}=0.06$$ the resistance anisotropy closes above the structural transition, at the same temperature at which the zero-field short-range magnetic order disappears and the sample becomes paramagnetic. Finally, we suggest that under an external magnetic field the resistance anisotropy mirrors the magnetic order parameter. We discuss similarities to nematic order observed in other iron pnictide materials.

Authors:
 [1];  [2];  [3];  [1];  [4]
  1. Univ. of California, Berkeley, CA (United States). Department of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division
  2. Univ. of California, Berkeley, CA (United States). Department of Materials Science and Engineering
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division
  4. Univ. of California, Berkeley, CA (United States). Department of Physics and Department of Materials Science and Engineering; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1437963
Grant/Contract Number:  
AC02-05CH11231; AC03-76SF00098
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Condensed Matter
Additional Journal Information:
Journal Volume: 29; Journal Issue: 28; Journal ID: ISSN 0953-8984
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Helm, T., Valdivia, P. N., Bourret-Courchesne, E., Analytis, J. G., and Birgeneau, R. J. The influence of magnetic order on the magnetoresistance anisotropy of Fe1 + δ–xCuxTe. United States: N. p., 2017. Web. doi:10.1088/1361-648x/aa73c1.
Helm, T., Valdivia, P. N., Bourret-Courchesne, E., Analytis, J. G., & Birgeneau, R. J. The influence of magnetic order on the magnetoresistance anisotropy of Fe1 + δ–xCuxTe. United States. https://doi.org/10.1088/1361-648x/aa73c1
Helm, T., Valdivia, P. N., Bourret-Courchesne, E., Analytis, J. G., and Birgeneau, R. J. Wed . "The influence of magnetic order on the magnetoresistance anisotropy of Fe1 + δ–xCuxTe". United States. https://doi.org/10.1088/1361-648x/aa73c1. https://www.osti.gov/servlets/purl/1437963.
@article{osti_1437963,
title = {The influence of magnetic order on the magnetoresistance anisotropy of Fe1 + δ–xCuxTe},
author = {Helm, T. and Valdivia, P. N. and Bourret-Courchesne, E. and Analytis, J. G. and Birgeneau, R. J.},
abstractNote = {In this study, e performed resistance measurements on $\text{F}{{\text{e}}_{1+\delta -x}}$ Cu x Te with ${{x}_{\text{EDX}}}\leqslant 0.06$ in the presence of in-plane applied magnetic fields, revealing a resistance anisotropy that can be induced at a temperature far below the structural and magnetic zero-field transition temperatures. The observed resistance anisotropy strongly depends on the field orientation with respect to the crystallographic axes, as well as on the field-cooling history. Our results imply a correlation between the observed features and the low-temperature magnetic order. Hysteresis in the angle-dependence indicates a strong pinning of the magnetic order within a temperature range that varies with the Cu content. The resistance anisotropy vanishes at different temperatures depending on whether an external magnetic field or a remnant field is present: the closing temperature is higher in the presence of an external field. For ${{x}_{\text{EDX}}}=0.06$ the resistance anisotropy closes above the structural transition, at the same temperature at which the zero-field short-range magnetic order disappears and the sample becomes paramagnetic. Finally, we suggest that under an external magnetic field the resistance anisotropy mirrors the magnetic order parameter. We discuss similarities to nematic order observed in other iron pnictide materials.},
doi = {10.1088/1361-648x/aa73c1},
journal = {Journal of Physics. Condensed Matter},
number = 28,
volume = 29,
place = {United States},
year = {Wed May 17 00:00:00 EDT 2017},
month = {Wed May 17 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: Resistance versus temperature for each composition in a variety of fields. Both RH//[1,0,0] (dash) and RH//[0,1,0] (solid) are shown at each field with the former having higher resistance than the latter.The inset in panel (d) shows a zoom-in of the μ0H = 5 T data.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.