Equilibrium tuned by a magnetic field in phase separated manganite

Abstract

We present magnetic and transport measurements on La5/8-yPryCa3/8MnO3 with y = 0.3, a manganite compound exhibiting intrinsic multiphase coexistence of sub-micrometric ferromagnetic and antiferromagnetic charge ordered regions. Time relaxation effects between 60 and 120K, and the obtained magnetic and resistive viscosities, unveils the dynamic nature of the phase separated state. An experimental procedure based on the derivative of the time relaxation after the application and removal of a magnetic field enables the determination of the otherwise unreachable equilibrium state of the phase separated system. With this procedure the equilibrium phase fraction for zero field as a function of temperature is obtained. The presented results allow a correlation between the distance of the system to the equilibrium state and its relaxation behavior.

13 pages, 5 figures. Submited to Journal of Physics: Condensed Matter

References in corpus (20)

• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• Memory and Chaos Effects in Spin Glasses
• Martensitic accommodation strain and the metal-insulator transition in manganites
• Controlled Phase Separation in La_0.5 Ca_0.5 Mn O_3
• Novel dynamical effects and persistent memory in phase separated manganites
• Nanoscale Phase Separation in Colossal Magnetoresistance Materials: A Lesson for the Cuprates?
• Competing Orders and Disorder-induced Insulator to Metal Transition in Manganites
• Giant 1/f noise in perovskite manganites: evidence of the percolation threshold
• Relating supercooling and glass-like arrest of kinetics for phase separated systems: studies on doped CeFe${}_2$ and (La,Pr,Ca)MnO${}_3$
• Abrupt field-induced transition triggered by magnetocaloric effect in phase-separated manganites
• First-order nature of the ferromagnetic phase transition in (La-Ca)MnO_3 near optimal doping
• Why stripes? Spontaneous formation of inhomogeneous structures due to elastic interactions
• Magnetic relaxation in La0.250Pr0.375Ca0.375MnO3 with varying phase separation
• Optical Evidence of Multiphase Coexistence in Single Crystalline (La,Pr,Ca)MnO3
• Insulator to Metal Transition Induced by Disorder in a Model for Manganites
• Magnetoresistance induced by low-field control of phase separation in La0.5Ca0.5MnO3
• Field dependence of the electronic phase separation in Pr0.67Ca0.33MnO3 by small angle magnetic neutron scattering
• Thermodynamic modeling of phase separation in manganites
• Persistent X-Ray Photoconductivity and Percolation of Metallic Clusters in Charge-Ordered Manganites
• Mesoscopic, Non-equilibrium Fluctuations of Inhomogeneous Electronic States in Manganites

Cited by in corpus (3)

• Static and Dynamic Signatures of Anisotropic Electronic Phase Separation in La2/3Ca1/3MnO3 Thin Films under Anisotropic Strain
• A Real Space Description of Magnetic Field Induced Melting in the Charge Ordered Manganites: I. The Clean Limit
• A Real Space Description of Field Induced Melting in the Charge Ordered Manganites: II. the Disordered Case