Nuclear spin relaxation of 8Li in a thin film of La 0.67Ca0.33MnO3

R. I. Miller; D. Arseneau; K. H. Chow; S. Daviel; A. Engelbertz; Md Hossain; T. Keeler; R. F. Kiefl; S. Kreitzman; C. D.P. Levy; P. Morales; G. D. Morris; W. A. MacFarlane; T. J. Parolin; R. Poutissou; H. Saadaoui; Z. Salman; D. Wang; J. Y.T. Wei

doi:10.1016/j.physb.2005.11.009

Nuclear spin relaxation of ⁸Li in a thin film of La _0.67Ca_0.33MnO₃

R. I. Miller
, D. Arseneau
, K. H. Chow
, S. Daviel
, A. Engelbertz
, Md Hossain
, T. Keeler
, R. F. Kiefl^*
, S. Kreitzman
, C. D.P. Levy
, P. Morales
, G. D. Morris
, W. A. MacFarlane
, T. J. Parolin
, R. Poutissou
, H. Saadaoui
, Z. Salman
, D. Wang
, J. Y.T. Wei

^*Corresponding author for this work

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

11 Scopus citations

Abstract

We report β-NMR measurements of the nuclear spin relaxation rate (1/T1) in a thin film of La_0.67Ca_0.33MnO₃ (LCMO) using a low-energy beam of spin-polarized ⁸Li. In a small magnetic field of 150 G, there is a broad peak in 1/T1 near the Curie temperature (Tc=259K) and a dramatic decrease in 1/T1 at lower temperatures. This is attributed to a critical slowing down of the spin fluctuations near Tc and freezing of the magnetic excitations at low temperatures, respectively. In addition, there is a small amplitude, slow relaxing component at high temperatures, which we attribute to ⁸Li in the SrTiO₃ substrate. There is an indication that the spin relaxation rate in the substrate is also peaked at Tc due to close proximity to the magnetic film. These results establish that low-energy β-NMR can be used as a probe of magnetic fluctuations in magnetic thin films over a wide range of temperatures.

Original language	English
Pages (from-to)	30-33
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	374-375
DOIs	https://doi.org/10.1016/j.physb.2005.11.009
State	Published - 31 Mar 2006
Externally published	Yes
Event	Proceedings of the Tenth International Conference on Muon Spin Rotation, Relaxation and Resonance - Duration: 8 Aug 2005 → 12 Aug 2005

Keywords

Ferromagnetism
LCMO
Manganites
β-NMR

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/j.physb.2005.11.009

Cite this

Miller, R. I., Arseneau, D., Chow, K. H., Daviel, S., Engelbertz, A., Hossain, M., Keeler, T., Kiefl, R. F., Kreitzman, S., Levy, C. D. P., Morales, P., Morris, G. D., MacFarlane, W. A., Parolin, T. J., Poutissou, R., Saadaoui, H., Salman, Z., Wang, D., & Wei, J. Y. T. (2006). Nuclear spin relaxation of ⁸Li in a thin film of La _0.67Ca_0.33MnO₃. Physica B: Condensed Matter, 374-375, 30-33. https://doi.org/10.1016/j.physb.2005.11.009

@article{4e72364c5521414880fe1bb1e425292e,

title = "Nuclear spin relaxation of 8Li in a thin film of La 0.67Ca0.33MnO3",

abstract = "We report β-NMR measurements of the nuclear spin relaxation rate (1/T1) in a thin film of La0.67Ca0.33MnO3 (LCMO) using a low-energy beam of spin-polarized 8Li. In a small magnetic field of 150 G, there is a broad peak in 1/T1 near the Curie temperature (Tc=259K) and a dramatic decrease in 1/T1 at lower temperatures. This is attributed to a critical slowing down of the spin fluctuations near Tc and freezing of the magnetic excitations at low temperatures, respectively. In addition, there is a small amplitude, slow relaxing component at high temperatures, which we attribute to 8Li in the SrTiO3 substrate. There is an indication that the spin relaxation rate in the substrate is also peaked at Tc due to close proximity to the magnetic film. These results establish that low-energy β-NMR can be used as a probe of magnetic fluctuations in magnetic thin films over a wide range of temperatures.",

keywords = "Ferromagnetism, LCMO, Manganites, β-NMR",

author = "Miller, \{R. I.\} and D. Arseneau and Chow, \{K. H.\} and S. Daviel and A. Engelbertz and Md Hossain and T. Keeler and Kiefl, \{R. F.\} and S. Kreitzman and Levy, \{C. D.P.\} and P. Morales and Morris, \{G. D.\} and MacFarlane, \{W. A.\} and Parolin, \{T. J.\} and R. Poutissou and H. Saadaoui and Z. Salman and D. Wang and Wei, \{J. Y.T.\}",

year = "2006",

month = mar,

day = "31",

doi = "10.1016/j.physb.2005.11.009",

language = "English",

volume = "374-375",

pages = "30--33",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier BV",

note = "Proceedings of the Tenth International Conference on Muon Spin Rotation, Relaxation and Resonance ; Conference date: 08-08-2005 Through 12-08-2005",

}

Miller, RI, Arseneau, D, Chow, KH, Daviel, S, Engelbertz, A, Hossain, M, Keeler, T, Kiefl, RF, Kreitzman, S, Levy, CDP, Morales, P, Morris, GD, MacFarlane, WA, Parolin, TJ, Poutissou, R, Saadaoui, H, Salman, Z, Wang, D & Wei, JYT 2006, 'Nuclear spin relaxation of ⁸Li in a thin film of La _0.67Ca_0.33MnO₃', Physica B: Condensed Matter, vol. 374-375, pp. 30-33. https://doi.org/10.1016/j.physb.2005.11.009

TY - JOUR

T1 - Nuclear spin relaxation of 8Li in a thin film of La 0.67Ca0.33MnO3

AU - Miller, R. I.

AU - Arseneau, D.

AU - Chow, K. H.

AU - Daviel, S.

AU - Engelbertz, A.

AU - Hossain, Md

AU - Keeler, T.

AU - Kiefl, R. F.

AU - Kreitzman, S.

AU - Levy, C. D.P.

AU - Morales, P.

AU - Morris, G. D.

AU - MacFarlane, W. A.

AU - Parolin, T. J.

AU - Poutissou, R.

AU - Saadaoui, H.

AU - Salman, Z.

AU - Wang, D.

AU - Wei, J. Y.T.

PY - 2006/3/31

Y1 - 2006/3/31

N2 - We report β-NMR measurements of the nuclear spin relaxation rate (1/T1) in a thin film of La0.67Ca0.33MnO3 (LCMO) using a low-energy beam of spin-polarized 8Li. In a small magnetic field of 150 G, there is a broad peak in 1/T1 near the Curie temperature (Tc=259K) and a dramatic decrease in 1/T1 at lower temperatures. This is attributed to a critical slowing down of the spin fluctuations near Tc and freezing of the magnetic excitations at low temperatures, respectively. In addition, there is a small amplitude, slow relaxing component at high temperatures, which we attribute to 8Li in the SrTiO3 substrate. There is an indication that the spin relaxation rate in the substrate is also peaked at Tc due to close proximity to the magnetic film. These results establish that low-energy β-NMR can be used as a probe of magnetic fluctuations in magnetic thin films over a wide range of temperatures.

AB - We report β-NMR measurements of the nuclear spin relaxation rate (1/T1) in a thin film of La0.67Ca0.33MnO3 (LCMO) using a low-energy beam of spin-polarized 8Li. In a small magnetic field of 150 G, there is a broad peak in 1/T1 near the Curie temperature (Tc=259K) and a dramatic decrease in 1/T1 at lower temperatures. This is attributed to a critical slowing down of the spin fluctuations near Tc and freezing of the magnetic excitations at low temperatures, respectively. In addition, there is a small amplitude, slow relaxing component at high temperatures, which we attribute to 8Li in the SrTiO3 substrate. There is an indication that the spin relaxation rate in the substrate is also peaked at Tc due to close proximity to the magnetic film. These results establish that low-energy β-NMR can be used as a probe of magnetic fluctuations in magnetic thin films over a wide range of temperatures.

KW - Ferromagnetism

KW - LCMO

KW - Manganites

KW - β-NMR

UR - https://www.scopus.com/pages/publications/33644769035

U2 - 10.1016/j.physb.2005.11.009

DO - 10.1016/j.physb.2005.11.009

M3 - Conference article

AN - SCOPUS:33644769035

SN - 0921-4526

VL - 374-375

SP - 30

EP - 33

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

T2 - Proceedings of the Tenth International Conference on Muon Spin Rotation, Relaxation and Resonance

Y2 - 8 August 2005 through 12 August 2005

ER -