β-Detected NMR Search for Magnetic Phase Separation in Epitaxial GaAs:Mn

Q. Song; K. H. Chow; R. I. Miller; I. Fan; M. D. Hossain; R. F. Kiefl; G. D. Morris; S. R. Kreitzman; C. D.P. Levy; T. J. Parolin; M. R. Pearson; Z. Salman; H. Saadaoui; M. Smadella; D. Wang; K. M. Yu; X. Liu; J. K. Furdyna; W. A. Macfarlane

doi:10.1016/j.phpro.2012.04.066

β-Detected NMR Search for Magnetic Phase Separation in Epitaxial GaAs:Mn

Q. Song, K. H. Chow, R. I. Miller, I. Fan, M. D. Hossain, R. F. Kiefl, G. D. Morris, S. R. Kreitzman, C. D.P. Levy, T. J. Parolin, M. R. Pearson, Z. Salman, H. Saadaoui, M. Smadella, D. Wang, K. M. Yu, X. Liu, J. K. Furdyna, W. A. Macfarlane

Research output: Contribution to journal › Conference article › peer-review

Abstract

To test for the microscopic magnetic phase separation in the dilute magnetic semiconductor Ga_1-xMn_xAs sug-gested by low energy muon spin rotation measurements[1], we present a detailed analysis of the amplitudes of the ⁸Li β-detected nuclear magnetic resonance in an epitaxially grown thin film of x = 5.4% Mn doped GaAs on a semi-insulating GaAs substrate with magnetic transition temperature T_C =72 K. The spectrum at 100 K corresponds to 73% of the full room temperature amplitude, and at 60 K to about 62%. The 11% loss of signal through the magnetic tran-sition is much smaller than that ∼ 50% found by low energy μSR[1], and may be entirely due to an amplitude change intrinsic to GaAs. This lack of evidence for phase separation is, however, consistent with the full volume fraction magnetism found by a second low energy μSR measurement on a different sample using weak transverse field[2].

Original language	English
Pages (from-to)	174-177
Number of pages	4
Journal	Physics Procedia
Volume	30
DOIs	https://doi.org/10.1016/j.phpro.2012.04.066
State	Published - 2012
Externally published	Yes
Event	12th International Conference on Muon Spin Rotation, Relaxation and Resonance, muSR 2011 - Cancun, Mexico Duration: 16 May 2011 → 20 May 2011

Bibliographical note

Publisher Copyright:
© 2012 Published by Elsevier B.V.

Keywords

GaAs:Mn
dilute magnetic semiconductors
low energy muons
thin films

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1016/j.phpro.2012.04.066

Cite this

Song, Q., Chow, K. H., Miller, R. I., Fan, I., Hossain, M. D., Kiefl, R. F., Morris, G. D., Kreitzman, S. R., Levy, C. D. P., Parolin, T. J., Pearson, M. R., Salman, Z., Saadaoui, H., Smadella, M., Wang, D., Yu, K. M., Liu, X., Furdyna, J. K., & Macfarlane, W. A. (2012). β-Detected NMR Search for Magnetic Phase Separation in Epitaxial GaAs:Mn. Physics Procedia, 30, 174-177. https://doi.org/10.1016/j.phpro.2012.04.066

@article{e386504e9cb74ae99278dd9ca8a4e123,

title = "β-Detected NMR Search for Magnetic Phase Separation in Epitaxial GaAs:Mn",

abstract = "To test for the microscopic magnetic phase separation in the dilute magnetic semiconductor Ga1-xMnxAs sug-gested by low energy muon spin rotation measurements[1], we present a detailed analysis of the amplitudes of the 8Li β-detected nuclear magnetic resonance in an epitaxially grown thin film of x = 5.4\% Mn doped GaAs on a semi-insulating GaAs substrate with magnetic transition temperature TC =72 K. The spectrum at 100 K corresponds to 73\% of the full room temperature amplitude, and at 60 K to about 62\%. The 11\% loss of signal through the magnetic tran-sition is much smaller than that ∼ 50\% found by low energy μSR[1], and may be entirely due to an amplitude change intrinsic to GaAs. This lack of evidence for phase separation is, however, consistent with the full volume fraction magnetism found by a second low energy μSR measurement on a different sample using weak transverse field[2].",

keywords = "GaAs:Mn, dilute magnetic semiconductors, low energy muons, thin films",

author = "Q. Song and Chow, \{K. H.\} and Miller, \{R. I.\} and I. Fan and Hossain, \{M. D.\} and Kiefl, \{R. F.\} and Morris, \{G. D.\} and Kreitzman, \{S. R.\} and Levy, \{C. D.P.\} and Parolin, \{T. J.\} and Pearson, \{M. R.\} and Z. Salman and H. Saadaoui and M. Smadella and D. Wang and Yu, \{K. M.\} and X. Liu and Furdyna, \{J. K.\} and Macfarlane, \{W. A.\}",

note = "Publisher Copyright: {\textcopyright} 2012 Published by Elsevier B.V.; 12th International Conference on Muon Spin Rotation, Relaxation and Resonance, muSR 2011 ; Conference date: 16-05-2011 Through 20-05-2011",

year = "2012",

doi = "10.1016/j.phpro.2012.04.066",

language = "English",

volume = "30",

pages = "174--177",

journal = "Physics Procedia",

issn = "1875-3884",

publisher = "Elsevier BV",

}

Song, Q, Chow, KH, Miller, RI, Fan, I, Hossain, MD, Kiefl, RF, Morris, GD, Kreitzman, SR, Levy, CDP, Parolin, TJ, Pearson, MR, Salman, Z, Saadaoui, H, Smadella, M, Wang, D, Yu, KM, Liu, X, Furdyna, JK & Macfarlane, WA 2012, 'β-Detected NMR Search for Magnetic Phase Separation in Epitaxial GaAs:Mn', Physics Procedia, vol. 30, pp. 174-177. https://doi.org/10.1016/j.phpro.2012.04.066

TY - JOUR

T1 - β-Detected NMR Search for Magnetic Phase Separation in Epitaxial GaAs:Mn

AU - Song, Q.

AU - Chow, K. H.

AU - Miller, R. I.

AU - Fan, I.

AU - Hossain, M. D.

AU - Kiefl, R. F.

AU - Morris, G. D.

AU - Kreitzman, S. R.

AU - Levy, C. D.P.

AU - Parolin, T. J.

AU - Pearson, M. R.

AU - Salman, Z.

AU - Saadaoui, H.

AU - Smadella, M.

AU - Wang, D.

AU - Yu, K. M.

AU - Liu, X.

AU - Furdyna, J. K.

AU - Macfarlane, W. A.

PY - 2012

Y1 - 2012

N2 - To test for the microscopic magnetic phase separation in the dilute magnetic semiconductor Ga1-xMnxAs sug-gested by low energy muon spin rotation measurements[1], we present a detailed analysis of the amplitudes of the 8Li β-detected nuclear magnetic resonance in an epitaxially grown thin film of x = 5.4% Mn doped GaAs on a semi-insulating GaAs substrate with magnetic transition temperature TC =72 K. The spectrum at 100 K corresponds to 73% of the full room temperature amplitude, and at 60 K to about 62%. The 11% loss of signal through the magnetic tran-sition is much smaller than that ∼ 50% found by low energy μSR[1], and may be entirely due to an amplitude change intrinsic to GaAs. This lack of evidence for phase separation is, however, consistent with the full volume fraction magnetism found by a second low energy μSR measurement on a different sample using weak transverse field[2].

AB - To test for the microscopic magnetic phase separation in the dilute magnetic semiconductor Ga1-xMnxAs sug-gested by low energy muon spin rotation measurements[1], we present a detailed analysis of the amplitudes of the 8Li β-detected nuclear magnetic resonance in an epitaxially grown thin film of x = 5.4% Mn doped GaAs on a semi-insulating GaAs substrate with magnetic transition temperature TC =72 K. The spectrum at 100 K corresponds to 73% of the full room temperature amplitude, and at 60 K to about 62%. The 11% loss of signal through the magnetic tran-sition is much smaller than that ∼ 50% found by low energy μSR[1], and may be entirely due to an amplitude change intrinsic to GaAs. This lack of evidence for phase separation is, however, consistent with the full volume fraction magnetism found by a second low energy μSR measurement on a different sample using weak transverse field[2].

KW - GaAs:Mn

KW - dilute magnetic semiconductors

KW - low energy muons

KW - thin films

UR - https://www.scopus.com/pages/publications/84978538774

U2 - 10.1016/j.phpro.2012.04.066

DO - 10.1016/j.phpro.2012.04.066

M3 - Conference article

AN - SCOPUS:84978538774

SN - 1875-3884

VL - 30

SP - 174

EP - 177

JO - Physics Procedia

JF - Physics Procedia

T2 - 12th International Conference on Muon Spin Rotation, Relaxation and Resonance, muSR 2011

Y2 - 16 May 2011 through 20 May 2011

ER -

β-Detected NMR Search for Magnetic Phase Separation in Epitaxial GaAs:Mn

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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