Direct experimental evidence of multiferroicity in a nanocrystalline Zener polaron ordered manganite

Abstract

We discuss the particle size driven tunability of the coexistence of ferromagnetism and ferroelectricity in Pr0.67Ca0.33MnO3(PCMO) with the help of x ray diffraction, magnetization, impedance spectroscopy, and remanent polarization measurements. The remanent polarization measurements using the positive up negative down method clearly prove the existence of ferroelectricity in PCMO with phase separation between Zener polaron(ZP) ordered P21nm and disordered Pbnm structures. We also find that the ferroelectric response is enhanced in nanocrystalline samples so long as ZP ordering is not destroyed while the long-range antiferromagnetic ordering at low temperature in bulk system is replaced by ferromagnetic correlations in nanoparticles. The conclusion that by reducing the crystallite size it might be possible to make ferromagnetism and ferroelectricity coexist near room temperature should be generally applicable to all ZP ordered manganites.

arXiv comment10 pages, 14 figures

References in corpus (19)

• Multiferroics: different ways to combine magnetism and ferroelectricity
• Multiferroicity due to charge ordering
• Mesoscopic and Microscopic Phase Segregation in Manganese Perovskites
• Surface phase separation in nanosized charge-ordered manganites
• Resonant x-ray diffraction study of the magnetoresistant perovskite Pr0.6Ca0.4MnO3
• New phase transition in $P{r}_{1-x}C{a}_{x}Mn{O}_3$ system: evidence for electrical polarization in charge ordered manganites
• Magnetodielectric consequences of phase separation in the colossal magnetoresistance manganite Pr0.7Ca0.3MnO3
• Modification of the Charge ordering in Pr${}_{1/2}$Sr${}_{1/2}$MnO${}_3$ Nanoparticles
• Experimental observation of charge ordering in nanocrystalline Pr${}_{0.65}$Ca${}_{0.35}$MnO${}_3$
• Anomaly in the dielectric response at the charge orbital ordering transition of crystalline Pr0.67Ca0.33MnO3
• Magnetically induced electronic ferroelectricity in half-doped manganites
• Multiferroicity induced by dislocated spin-density waves
• Microphase separation in Pr0.67Ca0.33MnO3 by small angle neutron scattering
• Ferromagnetic Polarons in La0.5Ca0.5MnO3 and La0.33Ca0.67MnO3
• Size control of Charge-Orbital Order in Half-Doped Manganite, La${}_{0.5}$Ca${}_{0.5}$MnO${}_3$
• Orbital Correlations in Doped Manganites
• Buckling induced Zener polaron instability in half-doped manganites
• Charge Ordering and Ferroelectricity in Half-doped Manganites
• Colossal enhancement of magnetoresistance in La${}_{0.67}$Sr${}_{0.33}$MnO${}_3$ / Pr${}_{0.67}$Ca${}_{0.33}$MnO${}_3$ multilayers: reproducing the phase-separation scenario

Cited by in corpus (6)

• Antiferromagnetic rare region effect in $P{r}_{0.5}C{a}_{0.5}Mn{O}_3$
• Spin excitations used to probe the nature of the exchange coupling in the magnetically ordered ground state of Pr${}_{0.5}$Ca${}_{0.5}$MnO${}_3$
• Emergence of ferroelectric switching in self organized Pr0.67Ca0.33MnO3 nanocrystal array
• Glassy dielectric anomaly and negative magneto-capacitance effect in electron-doped Ca${}_{1-x}$Sr${}_x$Mn${}_{0.85}$Sb${}_{0.15}$O${}_3$
• Transverse spin relaxation and magnetic correlation in $P{r}_{1-x}C{a}_{x}Mn{O}_3$ : influence of particle size variation and chemical doping
• Anomalous ferroelectric switching dynamics in single crystalline SrTiO3