Bulk and element-specific magnetism of medium-entropy and high-entropy Cantor-Wu alloys

D. Billington; A. D. N. James; E. I. Harris-Lee; D. A. Lagos; D. O'Neill; N. Tsuda; K. Toyoki; Y. Kotani; T. Nakamura; H. Bei; S. Mu; G. D. Samolyuk; G. M. Stocks; J. A. Duffy; J. W. Taylor; S. R. Giblin; S. B. Dugdale

doi:10.1103/PhysRevB.102.174405

Bulk and element-specific magnetism of medium-entropy and high-entropy Cantor-Wu alloys

D. Billington, A. D. N. James, E. I. Harris-Lee, D. A. Lagos, D. O'Neill, N. Tsuda, K. Toyoki, Y. Kotani, T. Nakamura, H. Bei, S. Mu, G. D. Samolyuk, G. M. Stocks, J. A. Duffy, J. W. Taylor, S. R. Giblin, S. B. Dugdale

Department of Physics

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

26 Citations (SciVal)

Abstract

Magnetic Compton scattering, x-ray magnetic circular dichroism spectroscopy, and bulk magnetometry measurements are performed on a set of medium- (NiFeCo and NiFeCoCr) and high-entropy (NiFeCoCrPd and NiFeCoCrMn) Cantor-Wu alloys. The bulk spin momentum densities determined by magnetic Compton scattering are remarkably isotropic, and this is a consequence of the smearing of the electronic structure by disorder scattering of the electron quasiparticles. Nonzero x-ray magnetic circular dichroism signals are observed for every element in every alloy indicating differences in the populations of the majority and minority spin states implying finite magnetic moments. When Cr is included in the solid solution, the Cr spin moment is unambiguously antiparallel to the total magnetic moment, while a vanishingly small magnetic moment is observed for Mn, despite calculations indicating a large moment. Some significant discrepancies are observed between the experimental bulk and surface magnetic moments. Despite the lack of quantitative agreement, the element-specific surface magnetic moments seem to be qualitatively reasonable.

Original language	English
Article number	174405
Journal	Physical Review B
Volume	102
DOIs	https://doi.org/10.1103/PhysRevB.102.174405
Publication status	Published - 5 Nov 2020

Access to Document

10.1103/PhysRevB.102.174405

Cite this

Billington, D., James, A. D. N., Harris-Lee, E. I., Lagos, D. A., O'Neill, D., Tsuda, N., Toyoki, K., Kotani, Y., Nakamura, T., Bei, H., Mu, S., Samolyuk, G. D., Stocks, G. M., Duffy, J. A., Taylor, J. W., Giblin, S. R., & Dugdale, S. B. (2020). Bulk and element-specific magnetism of medium-entropy and high-entropy Cantor-Wu alloys. Physical Review B, 102, Article 174405. https://doi.org/10.1103/PhysRevB.102.174405

Billington, D, James, ADN, Harris-Lee, EI, Lagos, DA, O'Neill, D, Tsuda, N, Toyoki, K, Kotani, Y, Nakamura, T, Bei, H, Mu, S, Samolyuk, GD, Stocks, GM, Duffy, JA, Taylor, JW, Giblin, SR & Dugdale, SB 2020, 'Bulk and element-specific magnetism of medium-entropy and high-entropy Cantor-Wu alloys', Physical Review B, vol. 102, 174405. https://doi.org/10.1103/PhysRevB.102.174405

@article{fab00f1186da4cc28db0676adbef61e2,

title = "Bulk and element-specific magnetism of medium-entropy and high-entropy Cantor-Wu alloys",

abstract = "Magnetic Compton scattering, x-ray magnetic circular dichroism spectroscopy, and bulk magnetometry measurements are performed on a set of medium- (NiFeCo and NiFeCoCr) and high-entropy (NiFeCoCrPd and NiFeCoCrMn) Cantor-Wu alloys. The bulk spin momentum densities determined by magnetic Compton scattering are remarkably isotropic, and this is a consequence of the smearing of the electronic structure by disorder scattering of the electron quasiparticles. Nonzero x-ray magnetic circular dichroism signals are observed for every element in every alloy indicating differences in the populations of the majority and minority spin states implying finite magnetic moments. When Cr is included in the solid solution, the Cr spin moment is unambiguously antiparallel to the total magnetic moment, while a vanishingly small magnetic moment is observed for Mn, despite calculations indicating a large moment. Some significant discrepancies are observed between the experimental bulk and surface magnetic moments. Despite the lack of quantitative agreement, the element-specific surface magnetic moments seem to be qualitatively reasonable.",

author = "D. Billington and James, {A. D. N.} and Harris-Lee, {E. I.} and Lagos, {D. A.} and D. O'Neill and N. Tsuda and K. Toyoki and Y. Kotani and T. Nakamura and H. Bei and S. Mu and Samolyuk, {G. D.} and Stocks, {G. M.} and Duffy, {J. A.} and Taylor, {J. W.} and Giblin, {S. R.} and Dugdale, {S. B.}",

year = "2020",

month = nov,

day = "5",

doi = "10.1103/PhysRevB.102.174405",

language = "English",

volume = "102",

journal = "Physical Review B",

issn = "1098-0121",

publisher = "American Physical Society",

}

TY - JOUR

T1 - Bulk and element-specific magnetism of medium-entropy and high-entropy Cantor-Wu alloys

AU - Billington, D.

AU - James, A. D. N.

AU - Harris-Lee, E. I.

AU - Lagos, D. A.

AU - O'Neill, D.

AU - Tsuda, N.

AU - Toyoki, K.

AU - Kotani, Y.

AU - Nakamura, T.

AU - Bei, H.

AU - Mu, S.

AU - Samolyuk, G. D.

AU - Stocks, G. M.

AU - Duffy, J. A.

AU - Taylor, J. W.

AU - Giblin, S. R.

AU - Dugdale, S. B.

PY - 2020/11/5

Y1 - 2020/11/5

N2 - Magnetic Compton scattering, x-ray magnetic circular dichroism spectroscopy, and bulk magnetometry measurements are performed on a set of medium- (NiFeCo and NiFeCoCr) and high-entropy (NiFeCoCrPd and NiFeCoCrMn) Cantor-Wu alloys. The bulk spin momentum densities determined by magnetic Compton scattering are remarkably isotropic, and this is a consequence of the smearing of the electronic structure by disorder scattering of the electron quasiparticles. Nonzero x-ray magnetic circular dichroism signals are observed for every element in every alloy indicating differences in the populations of the majority and minority spin states implying finite magnetic moments. When Cr is included in the solid solution, the Cr spin moment is unambiguously antiparallel to the total magnetic moment, while a vanishingly small magnetic moment is observed for Mn, despite calculations indicating a large moment. Some significant discrepancies are observed between the experimental bulk and surface magnetic moments. Despite the lack of quantitative agreement, the element-specific surface magnetic moments seem to be qualitatively reasonable.

AB - Magnetic Compton scattering, x-ray magnetic circular dichroism spectroscopy, and bulk magnetometry measurements are performed on a set of medium- (NiFeCo and NiFeCoCr) and high-entropy (NiFeCoCrPd and NiFeCoCrMn) Cantor-Wu alloys. The bulk spin momentum densities determined by magnetic Compton scattering are remarkably isotropic, and this is a consequence of the smearing of the electronic structure by disorder scattering of the electron quasiparticles. Nonzero x-ray magnetic circular dichroism signals are observed for every element in every alloy indicating differences in the populations of the majority and minority spin states implying finite magnetic moments. When Cr is included in the solid solution, the Cr spin moment is unambiguously antiparallel to the total magnetic moment, while a vanishingly small magnetic moment is observed for Mn, despite calculations indicating a large moment. Some significant discrepancies are observed between the experimental bulk and surface magnetic moments. Despite the lack of quantitative agreement, the element-specific surface magnetic moments seem to be qualitatively reasonable.

UR - https://doi.org/10.1103/PhysRevB.102.174405

U2 - 10.1103/PhysRevB.102.174405

DO - 10.1103/PhysRevB.102.174405

M3 - Article

SN - 1098-0121

VL - 102

JO - Physical Review B

JF - Physical Review B

M1 - 174405

ER -

Bulk and element-specific magnetism of medium-entropy and high-entropy Cantor-Wu alloys

Abstract

Access to Document

Other files and links

Fingerprint

Cite this