Heisenberg model analysis on inelastic powder neutron scattering data using parent and K doped BaMn2As2 samples

M. Ramazanoglu; A. Sapkota; A. Pandey; J. Lamsal; D. L. Abernathy; J. L. Niedziela; M. B. Stone; R. Salci; D. A. Acar; F. O. Oztirpan; S. Ozonder; A. Kreyssig; A. I. Goldman; D. C. Johnston; R. J. McQueeney

doi:10.1016/j.physb.2017.11.003

Heisenberg model analysis on inelastic powder neutron scattering data using parent and K doped BaMn₂As₂ samples

M. Ramazanoglu, A. Sapkota, A. Pandey, J. Lamsal, D. L. Abernathy, J. L. Niedziela, M. B. Stone, R. Salci, D. A. Acar, F. O. Oztirpan, S. Ozonder, A. Kreyssig, A. I. Goldman, D. C. Johnston, R. J. McQueeney

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Low temperature powder inelastic neutron scattering measurements were performed on three different powder samples; parent BaMn₂As₂,12.5% K-doped Ba_0.875K_0.125Mn₂As₂ and 25% K-doped Ba_(0.75)K_0.25Mn₂As₂. The Heisenberg Model involving J₁‐J₂‐J_z coupling constants were compared to the data by a powder integration routine using Monte Carlo integration methods. The best magnetic parameters were selected using a chi-square test where model intensities were compared to the full (q,E) dependence of magnetic scattering. A key step to this analysis is the characterization of the background which is formed mostly by phonon scattering intensities along with other sources including the magnetic impurity scattering events. The calculated powder magnetic intensities added to the estimated background obtained from the non-magnetic high momentum transfer region. The agreement between the simulated and the raw data enabled us to perform quantitative analysis of the unreacted MnO impurities. Overall, this is another confirmation along with earlier studies using this technique, that magnetic exchange constants can be calculated within an acceptable range with a very quick inelastic neutron powder experiment without need for a single crystal sample.

Original language	English
Pages (from-to)	51-59
Number of pages	9
Journal	Physica B: Physics of Condensed Matter
Volume	551
DOIs	https://doi.org/10.1016/j.physb.2017.11.003
State	Published - Dec 15 2018

Funding

Work at ITU is supported by TUBITAK 2232 with the contract number; 114C148. Work at the Ames Laboratory was supported by the Department of Energy, Basic Energy Sciences, Division of Materials Sciences and Engineering , under Contract No. DE-AC02-07CH11358 . This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. Work at ITU is supported by TUBITAK 2232 with the contract number; 114C148. Work at the Ames Laboratory was supported by the Department of Energy, Basic Energy Sciences, Division of Materials Sciences and Engineering, under Contract No. DE-AC02-07CH11358. This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.

Funders	Funder number
TUBITAK 2232	114C148
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Oak Ridge National Laboratory
Division of Materials Sciences and Engineering	DE-AC02-07CH11358

Keywords

Inelastic neutron scattering
Iron arsenic superconductors
Superconductivity

Access to Document

10.1016/j.physb.2017.11.003

Cite this

Ramazanoglu, M., Sapkota, A., Pandey, A., Lamsal, J., Abernathy, D. L., Niedziela, J. L., Stone, M. B., Salci, R., Acar, D. A., Oztirpan, F. O., Ozonder, S., Kreyssig, A., Goldman, A. I., Johnston, D. C., & McQueeney, R. J. (2018). Heisenberg model analysis on inelastic powder neutron scattering data using parent and K doped BaMn₂As₂ samples. Physica B: Physics of Condensed Matter, 551, 51-59. https://doi.org/10.1016/j.physb.2017.11.003

@article{4cb2f0c08d5e4a5098bbd0bb28c76afe,

title = "Heisenberg model analysis on inelastic powder neutron scattering data using parent and K doped BaMn2As2 samples",

abstract = "Low temperature powder inelastic neutron scattering measurements were performed on three different powder samples; parent BaMn2As2,12.5% K-doped Ba0.875K0.125Mn2As2 and 25% K-doped Ba(0.75)K0.25Mn2As2. The Heisenberg Model involving J1‐J2‐Jz coupling constants were compared to the data by a powder integration routine using Monte Carlo integration methods. The best magnetic parameters were selected using a chi-square test where model intensities were compared to the full (q,E) dependence of magnetic scattering. A key step to this analysis is the characterization of the background which is formed mostly by phonon scattering intensities along with other sources including the magnetic impurity scattering events. The calculated powder magnetic intensities added to the estimated background obtained from the non-magnetic high momentum transfer region. The agreement between the simulated and the raw data enabled us to perform quantitative analysis of the unreacted MnO impurities. Overall, this is another confirmation along with earlier studies using this technique, that magnetic exchange constants can be calculated within an acceptable range with a very quick inelastic neutron powder experiment without need for a single crystal sample.",

keywords = "Inelastic neutron scattering, Iron arsenic superconductors, Superconductivity",

author = "M. Ramazanoglu and A. Sapkota and A. Pandey and J. Lamsal and Abernathy, {D. L.} and Niedziela, {J. L.} and Stone, {M. B.} and R. Salci and Acar, {D. A.} and Oztirpan, {F. O.} and S. Ozonder and A. Kreyssig and Goldman, {A. I.} and Johnston, {D. C.} and McQueeney, {R. J.}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2018",

month = dec,

day = "15",

doi = "10.1016/j.physb.2017.11.003",

language = "English",

volume = "551",

pages = "51--59",

journal = "Physica B: Physics of Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

}

Ramazanoglu, M, Sapkota, A, Pandey, A, Lamsal, J, Abernathy, DL , Niedziela, JL , Stone, MB, Salci, R, Acar, DA, Oztirpan, FO, Ozonder, S, Kreyssig, A, Goldman, AI, Johnston, DC & McQueeney, RJ 2018, 'Heisenberg model analysis on inelastic powder neutron scattering data using parent and K doped BaMn₂As₂ samples', Physica B: Physics of Condensed Matter, vol. 551, pp. 51-59. https://doi.org/10.1016/j.physb.2017.11.003

TY - JOUR

T1 - Heisenberg model analysis on inelastic powder neutron scattering data using parent and K doped BaMn2As2 samples

AU - Ramazanoglu, M.

AU - Sapkota, A.

AU - Pandey, A.

AU - Lamsal, J.

AU - Abernathy, D. L.

AU - Niedziela, J. L.

AU - Stone, M. B.

AU - Salci, R.

AU - Acar, D. A.

AU - Oztirpan, F. O.

AU - Ozonder, S.

AU - Kreyssig, A.

AU - Goldman, A. I.

AU - Johnston, D. C.

AU - McQueeney, R. J.

PY - 2018/12/15

Y1 - 2018/12/15

N2 - Low temperature powder inelastic neutron scattering measurements were performed on three different powder samples; parent BaMn2As2,12.5% K-doped Ba0.875K0.125Mn2As2 and 25% K-doped Ba(0.75)K0.25Mn2As2. The Heisenberg Model involving J1‐J2‐Jz coupling constants were compared to the data by a powder integration routine using Monte Carlo integration methods. The best magnetic parameters were selected using a chi-square test where model intensities were compared to the full (q,E) dependence of magnetic scattering. A key step to this analysis is the characterization of the background which is formed mostly by phonon scattering intensities along with other sources including the magnetic impurity scattering events. The calculated powder magnetic intensities added to the estimated background obtained from the non-magnetic high momentum transfer region. The agreement between the simulated and the raw data enabled us to perform quantitative analysis of the unreacted MnO impurities. Overall, this is another confirmation along with earlier studies using this technique, that magnetic exchange constants can be calculated within an acceptable range with a very quick inelastic neutron powder experiment without need for a single crystal sample.

AB - Low temperature powder inelastic neutron scattering measurements were performed on three different powder samples; parent BaMn2As2,12.5% K-doped Ba0.875K0.125Mn2As2 and 25% K-doped Ba(0.75)K0.25Mn2As2. The Heisenberg Model involving J1‐J2‐Jz coupling constants were compared to the data by a powder integration routine using Monte Carlo integration methods. The best magnetic parameters were selected using a chi-square test where model intensities were compared to the full (q,E) dependence of magnetic scattering. A key step to this analysis is the characterization of the background which is formed mostly by phonon scattering intensities along with other sources including the magnetic impurity scattering events. The calculated powder magnetic intensities added to the estimated background obtained from the non-magnetic high momentum transfer region. The agreement between the simulated and the raw data enabled us to perform quantitative analysis of the unreacted MnO impurities. Overall, this is another confirmation along with earlier studies using this technique, that magnetic exchange constants can be calculated within an acceptable range with a very quick inelastic neutron powder experiment without need for a single crystal sample.

KW - Inelastic neutron scattering

KW - Iron arsenic superconductors

KW - Superconductivity

UR - http://www.scopus.com/inward/record.url?scp=85035120089&partnerID=8YFLogxK

U2 - 10.1016/j.physb.2017.11.003

DO - 10.1016/j.physb.2017.11.003

M3 - Article

AN - SCOPUS:85035120089

SN - 0921-4526

VL - 551

SP - 51

EP - 59

JO - Physica B: Physics of Condensed Matter

JF - Physica B: Physics of Condensed Matter

ER -