First-order-like magnetic transition in manganite oxide La0.7Ca0.3MnO3

Shin, Hyun-Jun; Lee, J. E.; Nam, Yoon Sung; Ju, Honglyoul; Park, C. W.

doi:10.1016/s0038-1098(01)00123-5

Cited by 138 publications

(37 citation statements)

References 12 publications

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“…This T c value (216 K) is less than that (T c ≈ 250 K) usually found in polycrystalline ceramic samples in La 1−x Ca x MnO 3 with 0.3 < x < 0.35, and which is indicated in the accepted phase diagram for this system [5]. This value agrees, however, well with those found in single crystal samples of the same composition, where T c values are usually found to be in the range 216-230 K [24,25,26,27,28], although some rare exceptions are known as well [29].…”

Section: Magnetic Propertiessupporting

confidence: 73%

Extrinsic inhomogeneity effects in magnetic, transport and magnetoresistive properties of () crystal prepared by the floating-zone method

Белевцев

Naugle

Rathnayaka

et al. 2005

Physica B: Condensed Matter

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Section: Magnetic Propertiessupporting

confidence: 73%

Extrinsic inhomogeneity effects in magnetic, transport and magnetoresistive properties of () crystal prepared by the floating-zone method

Белевцев

Naugle

Rathnayaka

et al. 2005

Physica B: Condensed Matter

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“…On the other hand, an unexpected dependence of the order of the ferromagnetic transition on doping has been reported for La 1−x Ca x MnO 3 . The transition in La 0.8 Ca 0.2 MnO 3 is continuous [18], while that for La 0.7 Ca 0.3 MnO 3 was found to be of first order in various studies [19][20][21]. Quenched disorder in the Mn sublattice of La 0.67 Ca 0.33 MnO 3 introduced by Ga doping leads to a rounded magnetic phase transition characterized by the critical properties of a Heisenberg-like ferromagnet [22].…”

Section: Introductionmentioning

confidence: 93%

Critical Behavior Near the Paramagnetic to Ferromagnetic Phase Transition Temperature in Sr1.5Nd0.5MnO4 Compound

Zarai

Issaoui

Tozri

et al. 2016

J Supercond Nov Magn

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The magnetic properties and the critical behavior in Sr 1.5 Nd 0.5 MnO 4 have been investigated by magnetization measurements. The magnetic data indicate that the compound exhibits a second-order phase transition. The estimated critical exponents derived from the magnetic data using various techniques such as modified Arrott plot, Kouvel-Fisher method, and critical magnetization isotherms M (T C , H ). The critical exponent values for this compound was found to match well with those predicted for the mean-field model (δ = 2.212 ± 0.124, γ = 0.975 ± 0.018, and β = 0.502 ± 0.012) at T C = 228.59 ± 0.17. The critical exponent γ is slightly inferior than predicted from the mean-field model. Such a difference may be due, within the context of the quenched disorder and essentially the presence of the Griffiths phase. The temperature variation in the effective exponent (γ eff ) is similar to those for disordered ferromagnets.

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“…According to Refs. [19,20,21,22,23,24], paramagnetic-ferromagnetic (PM-FM) transition in this compound is of first order for the range 0.25 < x < 0.4. It is found in these compounds that FM metallic clusters are present well above T c , while some PM insulating clusters can persist down to a range far below T c [25,26,27].…”

mentioning

confidence: 94%