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The local chemistry, structure, and magnetism of (Ga,Fe)N nanocomposites grown by metal organic vapor phase epitaxy is studied by high resolution synchrotron x-ray diffraction and absorption, transmission electron microscopy, and…

We report the effect of Ni doping on superconductivity of PdTe. The superconducting parameters like critical temperature (Tc), upper critical field (Hc2) and normalized specific-heat jump are reported for Ni doped Pd1-xNixTe. The samples of…

超导电性 · 物理学 2016-06-22 Reena Goyal , Rajveer Jha , Brajesh Tiwari , Ambesh Dixit , V. P. S. Awana

The effect of Fe doping in the Mn site on the magnetic, transport and structural properties of polycrystalline La1/2Ca1/2MnO3 was studied. Doping with low Fe concentration (< 10%) strongly affects electrical transport and magnetization.…

材料科学 · 物理学 2016-08-31 P. Levy , L. Granja , E. Indelicato , D. Vega , G. Polla , F. Parisi

We report the growth by molecular beam epitaxy of highly resistive GdN, using intentional doping with magnesium. Mg-doped GdN layers with resistivities of 1000 {\Omega}.cm and carrier concentrations of 10E16 cm-3 are obtained for films with…

Pulsed laser deposition, a non-equilibrium thin-film growth technique, was used to stabilize metastable tetragonal iron sulfide (FeS), the bulk state of which is known as a superconductor with a critical temperature of 4 K. Comprehensive…

材料科学 · 物理学 2019-03-22 Kota Hanzawa , Masato Sasase , Hidenori Hiramatsu , Hideo Hosono

Lead iron niobate (PbFe0.5Nb0.5O3 - PFN) thin films were synthesized by a modified sol-gel route, which offers the advantage of a rapid, simple and non-toxic reaction method. Polycrystalline perovskite-structured PFN thin films without…

材料科学 · 物理学 2023-11-13 L. Imhoff , M. B. Di Marco , S. Barolin , M. A. Rengifo , M. H. Aguirre , M. G. Stachiotti

We studied the effect of dopants (Al, Ti, Zr) on the thermal stability of iron nitride thin films prepared using a dc magnetron sputtering technique. Structure and magnetic characterization of deposited samples reveal that the thermal…

材料科学 · 物理学 2014-10-15 Akhil Tayal , Mukul Gupta , Ajay Gupta , M. Horisberger , Jochen Stahn , Kai Schlage , H. -C. Wille

In this work we investigate the process of iron nitride (Fe-N) phase formation using 2 at.% Al or 2 at.% Ti as additives. The samples were prepared with a magnetron sputtering technique using different amount of nitrogen during the…

材料科学 · 物理学 2012-09-25 Rachana Gupta , Akhil Tayal , Mukul Gupta , Ajay Gupta , M. Horisberger , J. Stahn

Low dimensional perovskites are considered good candidates for light emitting applications given the high exciton binding energy which should in principle improve the radiative recombination efficiency. Yet, single-layered two-dimensional…

In the present work, we perform a systematic investigation on p-type codoping in (Ga,Mn)As. Through gradually increasing Zn doping concentration, the hole concentration increases, which should theoretically lead to an increase of the Curie…

A reentrant temperature dependence of the thermoresistivity $\rho_{\mathrm{xx}}(T)$ between an onset local superconducting ordering temperature $T_\mathrm{loc}^\mathrm{onset}$ and a global superconducting transition at…

In this work, we studied the local structure and the magnetization of Co4N thin films deposited by a reactive dc magnetron sputtering process. The interstitial incorporation of N atoms in a fcc Co lattice is expected to expand the structure…

材料科学 · 物理学 2018-03-14 Nidhi Pandey , Mukul Gupta , Rachana Gupta , Parasmani Rajput , Jochen Stahn

We have observed room temperature ferromagnetism (FM) in In$_2$O$_3$ thin films doped with either 5 at.% Mn or Fe, prepared by pulsed laser deposition (PLD) at substrate temperatures ranging from 300 to 600$\,^{\circ}{\rm C}$. The…

We fabricated NiFe2O thin films on MgAl2O4 (001) substrates by reactive dc magnetron co-sputtering in a pure oxygen atmosphere at different substrate temperatures. The film properties were investigated by various techniques with a focus on…

Magnetic nanoparticles (MNPs) have been extensively used in drug/gene delivery, hyperthermia therapy, magnetic particle imaging (MPI), magnetic resonance imaging (MRI), magnetic bioassays, etc. With proper surface chemical modifications,…

应用物理 · 物理学 2019-10-16 Kai Wu , Jinming Liu , Renata Saha , Bin Ma , Diqing Su , Chaoyi Peng , Jiajia Sun , Jian-Ping Wang

A series of c-axis oriented electron-doped high-Tc superconducting La(2-x)CexCuO4 thin films, from heavily underdoped x=0.06 to heavily overdoped x=0.19, have been synthesized by dc magnetron sputtering technique on (100) SrTiO3 substrates.…

超导电性 · 物理学 2009-08-18 B. X. Wu , K. Jin , J. Yuan , H. B. Wang , T. Hatano , B. R. Zhao , B. Y. Zhu

A study on temperature dependent magnetic properties of single phase orthorhombic perovskites system associated with space group Pbnm compounds Pr1-x(Gd/Nd)xMnO3 (x=0.3, 0.5, 0.7) was carried out. A magnetization reversal is observed below…

材料科学 · 物理学 2016-06-13 Sanjay Biswas , Sudipta Pal

The orthorhombically distorted perovskite NaMnF$_{3}$ has been predicted to become ferroelectric if an $a=c$ distortion of the bulk $Pnma$ structure is imposed. In order to test this prediction, NaMnF$_{3}$ thin films were grown on…

材料科学 · 物理学 2017-04-05 Amit KC , Pavel Borisov , Vladimir V. Shvartsman , David Lederman

Enhancement of Curie temperature ($T_\mathrm{C}$) of two-dimensional (2D) magnets is immensely desirable for room temperature spintronic applications. Fe$_{5}$GeTe$_{2}$ is an exceptional van der Waals metallic ferromagnet due to its…

材料科学 · 物理学 2023-05-09 Sukanya Ghosh , Soheil Ershadrad , Biplab Sanyal

We have studied the crystal and magnetic structures of Fe-doped hexagonal manganites LuMn1-xFexO3 (x = 0, 0.1, 0.2, and 0.3) by using bulk magnetization and neutron powder diffraction methods. The samples crystalize consistently in a…