title: Irreversible metamagnetic transition and magnetic memory in small-bandwidth manganite Pr(1-x)Ca(x)MnO3 (x = 0.0-0.5).
abstract: The present paper reports detailed structural and magnetic characterization of the low-bandwidth manganite Pr(1-x)Ca(x)MnO(3) (with x = 0.0-0.5) (PCMO) polycrystalline samples. With increasing Ca content, reduction of the unit cell volume and improvement in perovskite structure symmetry was observed at room temperature. Magnetic characterization shows the signature of coexisting AFM-FM ordering and spin-glass phase at the low doping range (x = 0.0-0.2) while increased hole doping (x = 0.3-0.5) leads to charge ordering, training effect and an irreversible metamagnetic phenomenon. The large irreversible metamagnetism in the CO phase of PCMO and the corresponding spin memory effect is a direct consequence of hysteretic first-order phase transition arising from the weakening of the CO state under the external magnetic field and trapping of the spins due to a strong pinning potential in the material.
authors.affiliation: Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, Turku, Finland. tomi.elovaara@utu.fi
authors.forename: T
authors.initials: T
authors.lastname: Elovaara
authors.forename: H
authors.initials: H
authors.lastname: Huhtinen
authors.forename: S
authors.initials: S
authors.lastname: Majumdar
authors.forename: P
authors.initials: P
authors.lastname: Paturi
mesh_terms: D016247:Information Storage and Retrieval / Q000379:methods*; D060526:Magnetic Fields; D017895:Manganese Compounds / Q000737:chemistry*; D008422:Materials Testing; D044367:Phase Transition
chemical_list: D017895:Manganese Compounds; C494384:manganite