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Title: Crystal growth, microstructure, and physical properties of SrMnSb2

Abstract

We report on the crystal and magnetic structures, magnetic, and transport properties of SrMnSb2 single crystals grown by the self-flux method. Magnetic susceptibility measurements reveal an antiferromagnetic (AFM) transition at TN = 295(3) K. Above TN, the susceptibility slightly increases and forms a broad peak at T ~ 420 K, which is a typical feature of two-dimensional magnetic systems. Neutron diffraction measurements on single crystals confirm the previously reported C-type AFM structure below TN. Both de Haas-van Alphen (dHvA) and Shubnikov-de Haas (SdH) effects are observed in SrMnSb2 single crystals. Analysis of the oscillatory component by a Fourier transform shows that the prominent frequencies obtained by the two different techniques are practically the same within error regardless of sample size or saturated magnetic moment. Transmission electron microscopy (TEM) reveals the existence of stacking faults in the crystals, which result from a horizontal shift of Sb atomic layers suggesting possible ordering of Sb vacancies in the crystals. Increase of temperature in susceptibility measurements leads to the formation of a strong peak at T ~ 570 K that upon cooling under magnetic field the susceptibility shows a ferromagnetic transition at TC ~ 580 K. Neutron powder diffraction on crushed single-crystals does notmore » support an FM phase above TN. Furthermore, X-ray magnetic circular dichroism (XMCD) measurements of a single crystal at the L2,3 edge of Mn shows a signal due to induced canting of AFM moments by the applied magnetic field. All evidence strongly suggests that a chemical transformation at the surface of single crystals occurs above 500 K concurrently producing a minute amount of ferromagnetic impurity phase.« less

Authors:
 [1];  [1];  [1];  [1];  [1]; ORCiD logo [2];  [3];  [4];  [5];  [5];  [5];  [5];  [5];  [6];  [5]
  1. Ames Lab., Ames, IA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Missouri, Columbia, MO (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  5. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
  6. Iowa State UniversityAmes Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Ames Laboratory (AMES), Ames, IA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1559635
Alternate Identifier(s):
OSTI ID: 1497250; OSTI ID: 1556118; OSTI ID: 1559877
Report Number(s):
IS-J-9754
TRN: US2000333
Grant/Contract Number:  
AC05-00OR22725; AC02-07CH11358; AC02- 06CH11357; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 5
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Liu, Yong, Ma, Tao, Zhou, Lin, Straszheim, Warren E., Islam, Farhan, Tian, Wei, Heitmann, Thomas, Rosenberg, R. A., Wilde, John M., Li, Bing, Kreyssig, A., Goldman, A. I., Ueland, B G., McQueeney, Robert John, and Vaknin, D. Crystal growth, microstructure, and physical properties of SrMnSb2. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.99.054435.
Liu, Yong, Ma, Tao, Zhou, Lin, Straszheim, Warren E., Islam, Farhan, Tian, Wei, Heitmann, Thomas, Rosenberg, R. A., Wilde, John M., Li, Bing, Kreyssig, A., Goldman, A. I., Ueland, B G., McQueeney, Robert John, & Vaknin, D. Crystal growth, microstructure, and physical properties of SrMnSb2. United States. https://doi.org/10.1103/PhysRevB.99.054435
Liu, Yong, Ma, Tao, Zhou, Lin, Straszheim, Warren E., Islam, Farhan, Tian, Wei, Heitmann, Thomas, Rosenberg, R. A., Wilde, John M., Li, Bing, Kreyssig, A., Goldman, A. I., Ueland, B G., McQueeney, Robert John, and Vaknin, D. Thu . "Crystal growth, microstructure, and physical properties of SrMnSb2". United States. https://doi.org/10.1103/PhysRevB.99.054435. https://www.osti.gov/servlets/purl/1559635.
@article{osti_1559635,
title = {Crystal growth, microstructure, and physical properties of SrMnSb2},
author = {Liu, Yong and Ma, Tao and Zhou, Lin and Straszheim, Warren E. and Islam, Farhan and Tian, Wei and Heitmann, Thomas and Rosenberg, R. A. and Wilde, John M. and Li, Bing and Kreyssig, A. and Goldman, A. I. and Ueland, B G. and McQueeney, Robert John and Vaknin, D},
abstractNote = {We report on the crystal and magnetic structures, magnetic, and transport properties of SrMnSb2 single crystals grown by the self-flux method. Magnetic susceptibility measurements reveal an antiferromagnetic (AFM) transition at TN = 295(3) K. Above TN, the susceptibility slightly increases and forms a broad peak at T ~ 420 K, which is a typical feature of two-dimensional magnetic systems. Neutron diffraction measurements on single crystals confirm the previously reported C-type AFM structure below TN. Both de Haas-van Alphen (dHvA) and Shubnikov-de Haas (SdH) effects are observed in SrMnSb2 single crystals. Analysis of the oscillatory component by a Fourier transform shows that the prominent frequencies obtained by the two different techniques are practically the same within error regardless of sample size or saturated magnetic moment. Transmission electron microscopy (TEM) reveals the existence of stacking faults in the crystals, which result from a horizontal shift of Sb atomic layers suggesting possible ordering of Sb vacancies in the crystals. Increase of temperature in susceptibility measurements leads to the formation of a strong peak at T ~ 570 K that upon cooling under magnetic field the susceptibility shows a ferromagnetic transition at TC ~ 580 K. Neutron powder diffraction on crushed single-crystals does not support an FM phase above TN. Furthermore, X-ray magnetic circular dichroism (XMCD) measurements of a single crystal at the L2,3 edge of Mn shows a signal due to induced canting of AFM moments by the applied magnetic field. All evidence strongly suggests that a chemical transformation at the surface of single crystals occurs above 500 K concurrently producing a minute amount of ferromagnetic impurity phase.},
doi = {10.1103/PhysRevB.99.054435},
journal = {Physical Review B},
number = 5,
volume = 99,
place = {United States},
year = {Thu Feb 28 00:00:00 EST 2019},
month = {Thu Feb 28 00:00:00 EST 2019}
}

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