Electric field driven dynamic percolation in electronically phase separated (La<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mrow><mml:mn>0.4</mml:mn></mml:mrow></mml:msub></mml:math>Pr<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mrow><mml:mn>0.6</mml:mn></mml:mrow></mml:msub></mml:math>)<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mrow><mml:

Jeen, Hyoungjeen; Biswas, Amlan

doi:10.1103/physrevb.88.024415

Cited by 32 publications

(32 citation statements)

References 35 publications

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“…7-10 Amongst these materials, La 1ÀxÀy Pr y Ca x MnO 3 has emerged as the prototypical phase separated system and its different variants like bulk single crystal, polycrystals, and thin films have been investigated. [7][8][9][10][11][12][13][14][15][16] The strong nature of the phase separation has been established by the observation of (i) strong divergence of the zero filed cooled (ZFC) and field cooled warming (FCW) magnetization, (ii) pronounced hysteresis between the field cooled cool (FCC) and FCW magnetization, and (iii) prominent thermomagnetic hysteresis in the temperature and magnetic field (H) dependent resistivity (q) measured in cooling-warming cycles. [7][8][9][10][11][12][13][14][15][16] A study by Uehara et al 7 has shown the coexistence of sub-micrometer scale ferromagnetic metallic (FMM) and antiferromagnetic/charge ordered insulator (AFM/COI) clusters and that the latter is explicit in magnetotransport measurements only at y !…”

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confidence: 99%

“…This could be attributed to defect induced quenching of AFM/COI in thin film form. [12][13][14][15][16] The drastic difference between the FM transition temperatures in FCC and FCW protocols can be understood in terms of the accommodation strain arising due to the distinct structural symmetry of the coexisting FM (pseudocubic) and AFM/COI (orthorhombic) phases. 11,21 The accommodation strain and the magnetic frustration induced by AFM order would create multiple minima in the energy landscape of the system and hence could hinder the nucleation of the equilibrium low temperature state.…”

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Supercooling transition in phase separated manganite thin films: An electrical transport study

Singh

Kumar

Siwach

et al. 2014

Applied Physics Letters

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The impact of variation in the relative fractions of the ferromagnetic metallic and antiferromagnetic/charge ordered insulator phases on the supercooling/superheating transition in strongly phase separated system, La5/8−yPryCa3/8MnO3 (y ≈ 0.4), has been studied employing magnetotransport measurements. Our study clearly shows that the supercooling transition temperature is non-unique and strongly depends on the magneto-thermodynamic path through which the low temperature state is accessed. In contrast, the superheating transition temperature remains constant. The thermo-magnetic hysteresis, the separation of the two transitions and the associated resistivity, all are functions of the relative fraction of the coexisting phases.

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Supercooling transition in phase separated manganite thin films: An electrical transport study

Singh

Kumar

Siwach

et al. 2014

Applied Physics Letters

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“…In addition, recent reports proposed that an electric field can align fluid-like FMM domains embedded in the COI matrix, 47,48 leading to improved connectivity and transport properties. Detailed time and voltage dependent studies pointed out the fluid-like dynamic nature of FMM domains in the COI matrix.…”

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confidence: 99%

“…Detailed time and voltage dependent studies pointed out the fluid-like dynamic nature of FMM domains in the COI matrix. 47 Guo et al reported that in the phase separated state, a laterally applied gating voltage induces electrophoretic-like domain movement and resistive switching at intermediate temperatures, while the electric field effect is suppressed at lower temperatures where the domain movement is restricted in the glassy phase. 48 In our EDLT experiments, notable electric field effect extends to the lowtemperature glassy region, suggesting the dominant role of electrostatic doping and possible field-induced seeding of new FMM domains in the transport modulation.…”

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Asymmetric electroresistance of cluster glass state in manganites

Lourembam

Ding

Bera

et al. 2014

Applied Physics Letters

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“…In (La0.4Pr0.6)0.67Ca0.33MnO3 thin films electric-field induced anisotropic transport has been observed in the FPS state by Jeen and Biswas. 19 According to them the main driving force for the anisotropy is the collective rearrangement of the FMM phase under electric fields.…”

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Effect of phase separation induced supercooling on magnetotransport properties of epitaxial La5/8−yPryCa3/8MnO3 (y≈0.4) thin film

et al. 2015

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Thin films of La5/8-yPryCa3/8MnO3 (y0.4) have been grown on single crystal SrTiO3 (001) by RF sputtering. The structural and surface characterizations confirm the epitaxial nature of these film. However, the difference between the -scan of the (002) and (110) peaks and the presence of pits/holes in the step-terrace type surface morphology suggests high density of defect in these films. Pronounced hysteresis between the field cool cooled (FCC) and field cooled warming (FCW) magnetization measurements suggest towards the non-ergodic magnetic state.The origin of this nonergodicity could be traced to the magnetic liquid like state arising from the delicacy of the coexisting magnetic phases, viz., ferromagnetic and antiferromagneticcharge ordered (FM/AFM-CO). The large difference between the insulator metal transitions during cooling and warming cycles (TIM C~6 4 K and TIM W~1 23 K) could be regarded as a manifestation of the nonergodicity leading to supercooling of the magnetic liquid while cooling. The nonergodicity and supercooling are weakened by the AFM-FM phase transition induced by an external magnetic field. TIM and small polaron activation energy corresponding the magnetic liquid state (cooling cycle) vary nonlinearly with the applied magnetic field but become linear in the crystalline solid state (warming cycle). The analysis of the low temperature resistivity data shows that electron-phonon interaction is drastically reduced by the applied magnetic field. The resistivity minimum in the lower temperature region of the selffield warming curve has been explained in terms of the Kondo like scattering in the magnetically inhomogeneous regime.

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Electric field driven dynamic percolation in electronically phase separated (La0.4Pr0.6)

Cited by 32 publications

References 35 publications

Supercooling transition in phase separated manganite thin films: An electrical transport study

Supercooling transition in phase separated manganite thin films: An electrical transport study

Asymmetric electroresistance of cluster glass state in manganites

Effect of phase separation induced supercooling on magnetotransport properties of epitaxial La5/8−yPryCa3/8MnO3 (y≈0.4) thin film

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