Martensitic accommodation strain and the metal-insulator transition in manganites

Abstract

In this paper, we report polarized optical microscopy and electrical transport studies of manganese oxides that reveal that the charge ordering transition in these compounds exhibits typical signatures of a martensitic transformation. We demonstrate that specific electronic properties of charge-ordered manganites stem from a combination of martensitic accommodation strain and effects of strong electron correlations. This intrinsic strain is strongly affected by the grain boundaries in ceramic samples. Consistently, our studies show a remarkable enhancement of low field magnetoresistance and the grain size effect on the resistivity in polycrystalline samples and suggest that the transport properties of this class of manganites are governed by the charge-disordered insulating phase stabilized at low temperature by virtue of martensitic accommodation strain. High sensitivity of this phase to strains and magnetic field leads to a variety of striking phenomena, such as unusually high magnetoresistance (10^10 %) in low magnetic fields.

Short paper, 4 figures, to appear in Rapid Communication

Cited by in corpus (44)

• Measurement of a solid-state triple point at the metal-insulator transition in VO2
• Intrinsic interface exchange coupling of ferromagnetic nanodomains in a charge ordered manganite
• Field-Induced Magnetization Steps in Intermetallic Compounds and Manganese Oxides: The Martensitic Scenario
• Nanoscale Phase Separation in Colossal Magnetoresistance Materials: A Lesson for the Cuprates?
• A Nanoscale Shape Memory Oxide
• Effect of strain and electric field on the electronic soft matter in manganite thin films
• Staircase effect in metamagnetic transitions of charge and orbitally ordered manganites
• Abrupt field-induced transition triggered by magnetocaloric effect in phase-separated manganites
• Experimental observation of charge ordering in nanocrystalline Pr${}_{0.65}$Ca${}_{0.35}$MnO${}_3$
• Magnetic relaxation in La0.250Pr0.375Ca0.375MnO3 with varying phase separation
• Non-volatile magnetoresistive memory in phase separated La${}_{0.325}$Pr${}_{0.300}$Ca${}_{0.375}$MnO${}_3$
• Evolution and control of the phase competition morphology in a manganite film
• Lamellar phase separation and dynamic competition in La0.23Ca0.77MnO3
• Strain selection of charge and orbital ordering patterns in half-doped manganites
• Magnetism in Gallium doped CeFe_2: The martensitic scenario
• Structural change and phase coexistence upon magnetic ordering in the magnetodielectric spinel Mn${}_3$O${}_4$
• Neutron scattering evidence for magnetic field driven abrupt magnetic and structural transitions in a phase separated manganite
• Structural and magnetic ordering in Pr0.65(CaySr1-y)0.35MnO3: "quantum critical point" versus phase segregation scenarios
• Tunneling magnetoresistance in (La,Pr,Ca)MnO3 nanobridges
• Towards a Classification of the Effects of Disorder on Materials Properties
• Thermodynamic modeling of phase separation in manganites
• Ambipolar gate effect and low temperature magnetoresistance of ultrathin La0.8Ca0.2MnO3 Films
• Common features of nanoscale structural correlations in magnetoresistive manganites with ferromagnetic low-temperature state
• Low frequency random telegraphic noise (RTN) and 1/f noise in the rare-earth manganite Pr${}_{0.63}$Ca${}_{0.37}$MnO${}_3$ near the charge-ordering transition
• Current-induced phase control in charged-ordered Nd0.5Ca0.5MnO3 and Pr0.6Ca0.4MnO3 crystals
• Effect of oxygen isotope substitution and crystal micro-structure on magnetic ordering and phase separation in {$(\mathrm{L}{\mathrm{a}}_{1-\mathrm{y}}\mathrm{P}{\mathrm{r}}_{\mathrm{y}}{)}_{0.7}\mathrm{C}{\mathrm{a}}_{0.3}\mathrm{Mn}{\mathrm{O}}_3$}
• Staircase-like metamagnetic transitions in phase-separated manganites: influence of thermal and mechanical treatments
• Low temperature irreversibility induced by thermal cycles on two prototypical phase separated manganites
• Equilibrium tuned by a magnetic field in phase separated manganite
• Magnetoresistive memory in phase separated La${}_{0.5}$Ca${}_{0.5}$MnO${}_3$
• Observation of photoinduced phase transition in phase-separated Pr${}_{0.55}$(Ca${}_{1-y}$Sr${}_y$)${}_{0.45}$MnO${}_3$ thin films via x-ray photoemission spectroscopy
• Intrinsic inhomogeneities and effects of resistive switching in doped manganites
• Effect of oxygen off-stoichiometry on coupled structural and magnetic phase-transitions in La0.15Sr0.85MnO3-d (d = 0.02, 0.14)
• Conductivity Oscillations in Current-Induced Metastable States in Low-Doped Manganite Single Crystals
• Evidence for strong effect of quenched correlated disorder on phase separation and magnetism in (La_{1-y}Pr_{y})_{0.7}Ca_{0.3}MnO_3
• Size of Orbital Ordering Domain Controlled by the Itinerancy of the 3d Electrons in a Manganite Thin Film
• Continuous first order orbital order-disorder transition in Nd1-xCaxMnO3
• Singularities of Magnetic and Elastic Characteristics of La2/3Ba1/3MnO3: Analysis of Martensitic Kinetics
• Studies of structural, magnetic, electrical and photoconducting properties of Bi${}_{1-x}$Ca${}_x$MnO${}_3$ epitaxial thin films
• Thermal cycling effects on static and dynamic properties of a phase separated manganite
• Intrinsic tunneling in phase separated manganites
• Thermal cycling memory in phase separated manganites
• Anomalous magnetoresistance effect in nanoengineered material
• Dynamics of the lattice and spins in the phase-separated manganite (Eu${}_{1-x}$Gd${}_x$)${}_{0.6}$Sr${}_{0.4}$MnO${}_3$