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Cluster spin glass behavior in Bi(Fe0.95Co0.05)O-3
The static and time-dependent magnetic properties of Bi(Fe0.95Co0.05)O3 have been investigated by dc and ac magnetization measurements. Cluster spin glass has been confirmed to be the ground state due...
PublikationenRoom temperature transparent ferromagnetism in 200 keV Ni2+ ion implanted pulsed laser deposition grown ZnO/sapphire film
Intrinsic ferromagnetism at room temperature has been observed in ZnO/sapphire films by implantation of 200 keV Ni2+ ions with fluences 6×1015, 8×1015, 1×1016, and 2×1016 ionscm2. Crystalline phases...
PublikationenFerromagnetic transition metal implanted ZnO: A diluted magnetic semiconductor?
Recent theoretical works have predicted that some semiconductors (e.g. ZnO) doped with magnetic ions are diluted magnetic semiconductors (DMS). In DMS, magnetic ions substitute cation sites of the host...
PublikationenMagnetoresistance and anomalous Hall effect in magnetic ZnO films
Magnetotransport measurements were performed on n-type conducting Co-doped ZnO and Mn-doped ZnO films prepared by pulsed laser deposition on a-plane sapphire substrates, and positive magnetoresistance...
PublikationenDecisive role of oxygen vacancy in ferroelectric versus ferromagnetic Mn-doped BaTiO3 thin films
Single-phase perovskite 5 at. % Mn-doped and undoped polycrystalline BaTiO3 thin films have been grown under different oxygen partial pressures by pulsed laser deposition on platinum-coated sapphire substrates....
PublikationenNonvolatile bipolar resistive switching in Au/BiFeO3/Pt
Nonvolatile bipolar resistive switching has been observed in an Au/BiFeO3/Pt structure, where a Schottky contact and a quasi-Ohmic contact were formed at the Au/BiFeO3 and BiFeO3/Pt interface, respectively....
PublikationenUnraveling carrier’s kinetics in tuning the ferromagnetism of transparent Zn0.95Co0.05O epitaxial films
The search of transparent conducting and ferromagnetic properties in Zn1_xCoxO based diluted magnetic semiconductor is explored either by chemically alloying the different concentration (x) of Co or by...
PublikationenProbing defect driven tunable spontaneous magnetization in paramagnetic Zn0.95Co0.05O epitaxial films by X-ray absorption investigations
In order to address existing unresolved issues related to intrinsic and extrinsic origins of ferromagnetism in Zn1_xCoxO based diluted magnetic semiconductors for varying x, the present work aims to investigate...
PublikationenDirect evidence of defect coordination and magnetic interaction in local structure of wurtzite type Zn1-xCoxO thin films
The local structure of as deposited and post treated Zn0.95Co0.05O films is investigated to understand the origin of their paramagnetic and tunable ferromagnetic properties for scientific advancements...
PublikationenMagnetic properties of ZnO nanopowders
We report the magnetic characterization of ZnO nanopowders with an average grain size of about 50nm prepared by sol–gel method. At room temperature, ZnO nanopowders exhibit diamagnetism like bulk ZnO....
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