Ferromagnetic Ordering and Unusual Magnetic Ion Dynamics in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>0.67</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ca</mml:mi></mml:mrow><mml:mrow><mml:mn>0.33</mml:mn></mml:mrow></mml:msub></mml:mrow></m

Heffner, R. H.; Le, L. P.; Hundley, M. F.; Neumeier, J. J.; Luke, G. M.; Kojima, Kenji; Nachumi, B.; Uemura, Y. J.; MacLaughlin, D. E.; Cheong, Sang‐Wook

doi:10.1103/physrevlett.77.1869

Cited by 168 publications

(85 citation statements)

References 30 publications

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“…4. Near T c the relaxation rate is outside the 8 Li time window in agreement with reported values of λ from µSR data [8]. Therefore we plot a lower bound for the relaxation rate.…”

Section: Resultssupporting

confidence: 76%

“…On a long time scale there is still a small amplitude (5% of full asymmetry 0.19) signal from a slowly relaxing component. We attribute this to small fraction of the 8 Li reaching the STO substrate as indicated from the TRIM simulations (see fig. 1).…”

Section: Resultsmentioning

confidence: 99%

“…In fig. 1 the simulated implantation profile of a beam of 8 Li ions with the nominal energy 28 keV in LCMO is shown. The peak occurs near the middle of the film (1,500Å) and 95.7% of the implanted 8 Li stop in the LCMO film.…”

Section: Resultsmentioning

confidence: 99%

“…The magnetic transition also occurs at T c = 259 K, at the same temperature as the insulator-metal transition. 8 Li is implanted during the time shown (0 ≤ t ≤ 4 s). The number of Li in the sample is highest at t = 4 s and the polarization has reached a steady-state value.…”

Section: Resultsmentioning

confidence: 99%

“…Phase separation is believed to play a key role in many of these phenomena [7]. Evidence for phase separation comes from numerous measurements such as µSR [8], surface techniques [9], neutron scattering [10], and NMR [11]. In particular, the NMR results yield coexisting antiferromagnetic and ferromagnetic phases whose volume fractions can be tracked with temperature and field.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Nuclear spin relaxation of 8Li in a thin film of La0.67Ca0.33MnO3

Miller

Arseneau

Chow

et al. 2006

Physica B: Condensed Matter

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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 8 Li. In a small magnetic field of 150 G there is broad peak in 1/T1 near the Curie temperature (Tc = 259 K) 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 8 Li in the STO substrate. There is 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.

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“…4. Near T c the relaxation rate is outside the 8 Li time window in agreement with reported values of λ from µSR data [8]. Therefore we plot a lower bound for the relaxation rate.…”

Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Nuclear spin relaxation of 8Li in a thin film of La0.67Ca0.33MnO3

Miller

Arseneau

Chow

et al. 2006

Physica B: Condensed Matter

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A Mechanical Investigation on the Phase Transition Behavior of La0.7Ca0.3MnO3—δ Ceramics

Chen¹,

Zhu

Hwang

et al. 1999

phys. stat. sol. (a)

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The characteristics of the phase transition of polycrystalline La0.7Ca0.3MnO3—δ (LCMO) was investigated by using the vibrating reed method. The internal friction (Q—1) of the sample shows two peaks: P1 and P2. The first internal friction peak, P1, appears in heating up and cooling down indicative of a paramagnetic to ferromagnetic phase transition with a considerable resonant frequency drop at the transition point. The second broader internal friction peak, P2, appears only in heating up and its corresponding frequency (f) exibits a maximum. Additionally, the P1 temperature was found to be linked with a thermal absorption peak and a variation of the magnetization and the electric resistance.

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Giant magnetoresistance, charge‐ordering, and related aspects of manganates and other oxide systems

Rao

Cheetham

1997

Advanced Materials

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Giant magnetoresistance, and spin‐, charge‐, and orbital‐ordering are some of the properties displayed by manganates that make these materials of interest in magnetic recording, sensor, and actuator technology. New and significant results on the giant magnetoresistance found in films as well as polycrystalline and single‐crystal samples of rare earth manganates are reviewed along with related aspects. The unique features of these systems and the as‐yet unsolved problems are highlighted. Charge‐ordering as opposed to spin‐ordering is also discussed and suggestions for future directions are given.

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Ferromagnetic Ordering and Unusual Magnetic Ion Dynamics inLa0.67Ca0.33

Cited by 168 publications

References 30 publications

Nuclear spin relaxation of 8Li in a thin film of La0.67Ca0.33MnO3

Nuclear spin relaxation of 8Li in a thin film of La0.67Ca0.33MnO3

A Mechanical Investigation on the Phase Transition Behavior of La0.7Ca0.3MnO3—δ Ceramics

Giant magnetoresistance, charge‐ordering, and related aspects of manganates and other oxide systems

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