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相关论文: Local structure surrounding V sites in Co doped Zn…

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The Co-doped anatase TiO$_{2}$, a recently discovered room-temperature ferromagnetic insulator, has been studied by the first-principles calculations in the pseudo-potential plane-wave formalism within the local-spin-density approximation…

材料科学 · 物理学 2007-05-23 Hongming Weng , Xiaoping Yang , Jinming Dong , H. Mizuseki , M. Kawasaki , Y. Kawazoe

In this article, we examine the structure and the electronic, optical, and magnetic properties of ZnTe before and after doping with the transition metal Mn. The ab initio calculations of this compound were performed using the full potential…

材料科学 · 物理学 2023-10-24 A. Brach , L. Bahmad , S. Benyoussef

The structural and magnetic properties of spinel compounds $CoB_2O_4$ (B=Cr,Mn and Fe) are studied using the DFT+U method and generalized gradient approximation (GGA). We concentrate on understanding the trends in the properties of these…

强关联电子 · 物理学 2016-09-21 Debashish Das , Rajkumar Biswas , Subhradip Ghosh

Here, we report an investigation of structural, magnetic and electronic properties in Y-doped layered iridate (Sr$_{1-x}$Y$_x$)$_2$IrO$_4$ ($x$ $\leq$ 0.1). The parent Sr$_2$IrO$_4$ is a well-studied spin-orbit coupling (SOC) induced…

强关联电子 · 物理学 2021-03-17 Imtiaz Noor Bhatti , A. K. Pramanik

The discovery of superconductivity in copper oxide compounds has attracted considerable attention over the past three decades. The high transition temperature in these compounds, exhibiting proximity to an antiferromagnetic order in their…

Neutron scattering has been used to investigate the evolution of the long- and short-range charge-ordered (CO), ferromagnetic (FM), and antiferromagnetic (AF) correlations in single crystals of Pr1-xCaxMnO3. The existence and population of…

强关联电子 · 物理学 2009-11-13 Hao Sha , F. Ye , Pengcheng Dai , J. A. Fernandez-Baca , D. Mesa , J. W. Lynn , Y. Tomioka , Y. Tokura , Jiandi Zhang

The strong corrugation of the V4O9 layer in the spin gap system CaV4O9 is examined for its impact on the exchange coupling constants between the spin 1/2 V ions. Local spin density (LSD) calculations show that the V spin occupies a…

强关联电子 · 物理学 2008-02-03 W. E. Pickett

A systematic LSDA+U study of doping effects on the electronic and structural properties of single layer CoO2 is presented. Undoped CoO2 is a charge transfer insulator within LSDA+U and a metal with a high density of states (DOS) at the…

超导电性 · 物理学 2007-05-23 Peihong Zhang , Weidong Luo , Vincent H. Crespi , Marvin L. Cohen , Steven G. Louie

57Fe Mossbauer spectroscopy measurements are presented in the underdoped Ba(Fe{1-x}Cox)2As2 series for x=0.014 (T_c < 1.4K) and x=0.03 and 0.045 (T_c ~ 2 and 12K respectively). The spectral shapes in the so-called spin-density wave (SDW)…

超导电性 · 物理学 2010-10-04 P. Bonville , F. Rullier-Albenque , D. Colson , A. Forget

Using the first-principles density-functional theory plan-wave pseudopotential method, we investigate the structure and magnetism in 25% Mn substitutive and interstitial doped monoclinic, tetragonal and cubic ZrO2 systematically. Our…

材料科学 · 物理学 2015-05-13 Xingtao Jia , Wei Yang , Minghui Qin , Jianping Li

Using resonant soft X-ray techniques we follow the magnetic behavior of a strained epitaxial film of CoCr2O4, a type-II multiferroic. The film is [110]-oriented, such that both the ferroelectric and ferromagnetic moments can coexist in…

A temperature-dependent EXAFS investigation of La{1-x}Ca{x}MnO3 is presented for the concentration range that spans the ferromagnetic-insulator (FMI) to ferromagnetic-metal (FMM) transition region, x = 0.16-0.22. The samples are insulating…

强关联电子 · 物理学 2009-11-13 Y. Jiang , F. Bridges , L. Downward , J. J. Neumeier

The magnetic correlations within the cuprates have undergone intense scrutiny as part of efforts to understand high temperature superconductivity. We explore the evolution of the magnetic correlations along the nodal direction of the…

The samples of Ga doped Cr2O3 oxide have been prepared using chemical co-precipitation route. X-ray diffraction pattern and Raman spectra have confirmed rhombohedral crystal structure with space group R3-C. Magnetic measurement has…

材料科学 · 物理学 2017-03-08 R. N. Bhowmik , K. Venkata Siva , R. Ranganathan , Chandan Mazumdar

We show that the magnetic characteristics of Ta|CoFeB|MgO magnetic heterostructures are strongly influenced by doping the Ta underlayer with nitrogen. In particular, the saturation magnetization drops upon doping the Ta underlayer,…

Silver-doped ZnO nanoparticles were successfully fabricated at $400\,^{\circ}\mathrm{C}$ via a simple and rapid method based on short time solid state milling and calcination of precursor powders. The effect of Ag dilute doping on the…

材料科学 · 物理学 2015-08-04 S. M. Hosseini , I. Abdolhosseini Sarsari , P. Kameli , H. Salamati

We report the magnetic properties in the Co- and Zn-doped spin-1/2 honeycomb-lattice compound In$_3$Cu$_2$VO$_9$. The magnetic susceptibility and specific heat experiments show no long-range ordering down to 2 K in In$_3$Cu$_2$VO$_9$. In…

强关联电子 · 物理学 2012-06-05 Y. J. Yan , Z. Y. Li , T. Zhang , X. G. Luo , G. J. Ye , Z. J. Xiang , P. Cheng , Liang-Jian Zou , X. H. Chen

We present a comprehensive single crystal neutron diffraction investigation of the $\rm Mn_{1-x}Co_{x}WO_4$ with $0.02\leq x \leq0.30$. At lower concentration $x \leq 0.05$, the system is quickly driven into the multiferroic phase with spin…

强关联电子 · 物理学 2012-10-01 Feng Ye , Songxue Chi , Jaime A. Fernandez-Baca , Huibo Cao , K. -C. Liang , Yaqi Wang , Bernd Lorenz , C. W. Chu

Structural, electronic and magnetic properties of polycrystalline La2-xCaxCoMnO6 (0 $\leq$ x $\leq$ 0.75) compounds are investigated by x-ray diffraction and magnetometry. All the samples have an orthorhombic structure and show a slight…

材料科学 · 物理学 2022-05-11 J. R. Jesus , L. Bufaiçal , E. M. Bittar

We present a combined high-resolution x-ray diffraction and x-ray resonant magnetic scattering (XRMS) study of as-grown BaFe2As2. The structural/magnetic transitions must be described as a two-step process. At T_S = 134.5 K we observe the…