F. Parisi

Abrupt field-induced transition triggered by magnetocaloric effect in phase-separated manganites

The occurrence at low temperatures of an ultrasharp field-induced transition in phase-separated manganites is analyzed. Experimental results show that magnetization and specific-heat steplike transitions below

Magnetization studies of phase separation in La 0.5 Ca 0.5 MnO 3

5\phantom{\rule{0.3em}{0ex}}\mathrm{K}

Nonvolatile magnetoresistive memory in phase separated La0.325Pr0.300Ca0.375MnO3

are correlated with an abrupt change of the sample temperature, which happens at a certain critical field. This temperature rise, a magnetocaloric effect, is interpreted as produced by the released energy at the transition point and is the key to understand the existence of the abrupt field-induced transition. A qualitative analysis of the results suggests the existence of a critical growing rate of the ferromagnetic phase, beyond which an avalanche effect is triggered.

Magnetoresistance induced by low-field control of phase separation in La 0.5 Ca 0.5 MnO 3

We present magnetization studies in a series of phase-separated

Thermodynamic modeling of phase separation in manganites

{\mathrm{La}}_{0.5}{\mathrm{Ca}}_{0.5}{\mathrm{MnO}}_{3}

Effects of Fe doping in La1/2Ca1/2MnO3

manganite samples, with different low-temperature fractions of the ferromagnetic (FM) and charge-ordered antiferromagnetic phases. A particular experimental procedure probes the effect of the magnetic field applied while cooling the samples, which promotes FM fraction enlargement and enhances the melting of the charge-ordered phase. The response of the system depending on its magnetic field history indicates the existence of three different regimes in the phase-separated state which develops below

Correlation between magnetic and transport properties of phase-separated La0.5Ca0.5MnO3

{T}_{C}.

Persistent magnetoresistive memory in phase separated manganites

Our data allow us to identify the onset temperature below which the system becomes magnetic and structurally phase separated and an onset field above which FM fraction enlargement occurs.

Dynamical effects in magnetic and transport properties of phase separated La0.5Ca0.5Mn0.95Fe0.05O3

We have measured magnetic and transport response on the polycrystalline La

Correlation between electrical and magnetic properties of phase-separated manganites studied with a general effective medium model

_{5/8-y}