Giant magnetoresistance, charge‐ordering, and related aspects of manganates and other oxide systems

Abstract

Giant magnetoresistance, and spin‐, charge‐, and orbital‐ordering are some of the properties displayed by manganates that make these materials of interest in magnetic recording, sensor, and actuator technology. New and significant results on the giant magnetoresistance found in films as well as polycrystalline and single‐crystal samples of rare earth manganates are reviewed along with related aspects. The unique features of these systems and the as‐yet unsolved problems are highlighted. Charge‐ordering as opposed to spin‐ordering is also discussed and suggestions for future directions are given.

Chemical synthesis and characterization of Mn3O4 thin films for supercapacitor application

“…The hausmannite phase, Mn 3 O 4 , has also been shown to possess electrochromic properties [10]. Furthermore, manganese oxide thin films serve as the substrate in the synthesis of magnetic oxide perovskite materials, which have important electrical and magnetic properties such as giant magnetoresistance, and metal-insulator transitions [11,12].…”

Transition Metal Pnictide-Halides: A Class of Under-Explored Compounds

“…Moreover, the chemistry of oxides has brought to attention a number of technologically exploitable phenomena, such as, for example, high T c superconductivity and giant magnetoresistance [1][2][3]. More recently, compounds containing another anion, together with oxygen have acquired a certain importance, such as the oxide fluoride Sr 2 CuO 2 F 2?d , showing superconductivity at 45 K [4].…”

“…Pnictide-halides are growing in importance, as they have been found to show attractive properties such as superconductivity. The chemistry of nitride-halides of alkaline-earth metals has been reported in the articles listed in reference 1 [5][6][7][8] and the chemistry of nitride-halides of lanthanides was reviewed by Schleid et al 2 [9,10]. The first and larger part of this review focuses on ternary pnictide-halides, which are here defined as compounds containing a single type of cation and two or more anions.…”

“…References to s-block pnictide-halides include[5][6][7][8] 2. References to f-block pnictide-halides include[9,10].…”

DC electronic transport mechanisms in some manganese-oxide insulator thin films grown on Si substrates

“…Such varieties in their structures and, hence in physical and chemical properties makes them attractive to study for fundamental physical properties and technological applications [4,[10][11][12]. Among numerous applications, they are used as base oxides in the synthesis of magnetic oxide perovskite compounds, which have a variety of electrical and magnetic properties like a colossal magnetoresistance and metal-insulator transitions [5,[13][14][15]. * Tel.…”