Giant 1/f noise in perovskite manganites: evidence of the percolation threshold

Abstract

We discovered an unprecedented magnitude of the 1/f noise near the Curie temperature Tc in low-Tc manganites. The scaling behavior of the 1/f noise and the resistance provides strong evidence of the percolation nature of the ferromagnetic transition in the polycrystalline samples. The step-like changes of the resistance with temperature, observed for single crystals, suggest that the size of the ferromagnetic domains depends on the size of crystallites.

4 pages, 3 figures

Cited by in corpus (32)

• Colossal Magnetoresistance is a Griffiths Singularity
• Griffiths singularities and magnetoresistive manganites
• Martensitic accommodation strain and the metal-insulator transition in manganites
• Novel dynamical effects and persistent memory in phase separated manganites
• Nanoscale Phase Separation in Colossal Magnetoresistance Materials: A Lesson for the Cuprates?
• Noise Probe of the Dynamic Phase Separation in La2/3Ca1/3MnO3
• Multiphase segregation and metal-insulator transition in single crystal La(5/8-y)Pr(y)Ca(3/8)MnO3
• Resistivity and 1/f Noise in Non-Metallic Phase Separated Manganites
• Optical Evidence of Multiphase Coexistence in Single Crystalline (La,Pr,Ca)MnO3
• Colossal magnetocapacitance and scale-invariant dielectric response in phase-separated manganites
• Non-volatile magnetoresistive memory in phase separated La${}_{0.325}$Pr${}_{0.300}$Ca${}_{0.375}$MnO${}_3$
• Electronic phase separation: recent progress in the old problem
• Magnetically-driven electronic phase separation in the semimetallic ferromagnet EuB${}_6$
• Discontinuous transitions in double exchange materials
• Towards a Classification of the Effects of Disorder on Materials Properties
• Magnetic, orbital and charge ordering in the electron-doped manganites
• Low frequency 1/f noise in doped manganite grain-boundary junctions
• Mesoscopic, Non-equilibrium Fluctuations of Inhomogeneous Electronic States in Manganites
• Low noise constant current source for bias dependent noise measurements
• Conductivity noise study of the insulator-metal transition and phase co-existence in epitaxial samarium nickelate thin films
• Hole-doping dependence of percolative phase separation in Pr_(0.5-delta)Ca_(0.2+delta)Sr_(0.3)MnO_(3) around half doping
• Equilibrium tuned by a magnetic field in phase separated manganite
• Influence of oxygen isotope exchange on the ground state of manganites
• Bias Dependent 1/f Conductivity Fluctuations in Low-Doped La${}_{1-x}$Ca${}_x$MnO${}_3$ Manganite Single Crystals
• Cooling rate dependence of the antiferromagnetic domain structure of a single crystalline charge ordered manganite
• Random telegraph noise from magnetic nanoclusters in the ferromagnetic semiconductor (Ga,Mn)As
• Investigation of a possible electronic phase separation in the magnetic semiconductors Ga${}_{1-x}$Mn${}_x$As and Ga${}_{1-x}$Mn${}_x$P by means of fluctuation spectroscopy
• Models of Mixed Matter
• Tuning the phase transition dynamics by variation of cooling field and metastable phase fraction in Al doped Pr${}_{0.5}$Ca${}_{0.5}$MnO${}_3$
• Persistent magnetoresistive memory in phase separated manganites
• Thermal relaxation in charge ordered Pr${}_{0.63}$ Ca${}_{0.37}$ MnO${}_3$ in presence of a magnetic field
• Magnetic field induced dielectric relaxation in the strain glass state of Pr0.6Ca0.4MnO3