Magnetic states and spin-glass properties in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi mathvariant="normal">Bi</mml:mi><mml:mn>0.67</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">Ca</mml:mi><mml:mn>0.33</mml:mn></mml:msub><mml:mi mathvariant="normal">Mn</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>: Macroscopic ac measurements and neutron scattering

Giot, M.; Pautrat, Alain; André, G.; Saurel, Damien; Hervieu, M.; Rodriguez-Carvajal, J.

doi:10.1103/physrevb.77.134445

Cited by 27 publications

(20 citation statements)

References 33 publications

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“…Below T g , the χ exhibits a logarithmic frequency dependence. Such a frequency dependence was observed for many SG systems [8]. However, it is not unique for SG but rather exists in any disordered system with a broad distribution of the activation barrier heights [9].…”

Section: Resultsmentioning

confidence: 96%

“…The intriguing Ni dopant have attracted the attention from the beginning of high-T C superconductivity. Nominally magnetic Ni 2+ ion (3d 8 , S = 1) is known to have a weaker effect on superconductivity than nominally non-magnetic Zn 2+ (3d 10 , S = 0) ion. As regard to electrical transport in the normal state, quasiparticle scattering at Ni was found to be predominantly non-magnetic [1].…”

Section: Introductionmentioning

confidence: 99%

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Magnetic Nature of a Ni Dopant in La_1.85Sr_0.15CuO₄: Spin-Glass Behavior

et al. 2010

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The magnetic properties of La1.85Sr0.15CuO4 doped with Ni was investigated in the field up to 5 T and in the temperature range from 2 K to 400 K using both dc and ac techniques. For Ni content larger than 0.05 the system exhibits irreversibility of low-field susceptibility χ(T ) below a certain temperature depending on y and a cusp at T g in χ(T ) measured after zero-field cooling. The decay of remnant magnetization below T g with time is described by a stretched-exponential function. In accordance with scaling theory, all the χ(T ) data for y = 0.50 sample taken in the vicinity of T g at different fields collapse onto two separate curves when plotted as q|t| −β vs. B 2 |t| −β−γ , where q is the spin-glass order parameter, t = (T − T g )/T g , and β and γ are the critical exponents. All these features taken together reveal existence of spin-glass phase below T g . Variation of T g with y is linear below y = 0.25 and T g extrapolates to 0 K for y → 0 what strongly suggests that spin-glass phase extends into superconducting region of the phase diagram.

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Magnetic Nature of a Ni Dopant in La_1.85Sr_0.15CuO₄: Spin-Glass Behavior

et al. 2010

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“…The SG state in our sample originates possibly from the competition between the FM DE interaction in BiMnO 3 -type clusters and AFM SE interactions [25,26]. The end compound (x¼0.6) shows a good sign of CO transition at T CO E292 K, followed by a transition to the SG state in the lower temperature region.…”

Section: Resultsmentioning

confidence: 87%

Magnetic and charge ordering properties of Bi0.6−xEuxCa0.4MnO3 (0.0≤x≤0.6)

Yadav

Singh

Razavi

et al. 2012

Journal of Magnetism and Magnetic Materials

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“…A bifurcation between ZFC and FC magnetization curves below 105 K exhibits a typical spin-glass (SG) state [28]. The SG state in our sample originates possibly from the competition between the FM double exchange (DE) interaction in BiMnO 3 -type clusters and AFM superexchange interactions (SE) [29,30]. Moreover, the sharp drop of ZFC curves and temperature dependence of FC magnetization at lower temperature is a signature of cluster-glass (CG) like behaviour rather than SG.…”

Section: Resultsmentioning

confidence: 97%