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The magnetic excitations in electron doped (Sr$_{1-x}$La$_x$)$_2$IrO$_4$ with $x = 0.03$ were measured using resonant inelastic X-ray scattering at the Ir $L_3$-edge. Although much broadened, well defined dispersive magnetic excitations…

强关联电子 · 物理学 2016-06-15 Xuerong Liu , M. P. M. Dean , Z. Y. Meng , M. H. Upton , T. Qi , T. Gog , Y. Cao , J. Q. Lin , D. Meyers , H. Ding , G. Cao , H. P. Hill

Dilute magnetic semiconductors (DMS) are nonmagnetic semiconductors doped with magnetic transition metals. The recently discovered DMS material (Ba$_{1-x}$K$_{x}$)(Zn$_{1-y}$Mn$_{y}$)$_{2}$As$_{2}$ offers a unique and versatile control of…

We have measured the magnetic susceptibility of single-crystal Cu_{1-x}Ni_xGeO_3 to study doping effects of the magnetic impurity (Ni^{2+} has S=1 spin) on the inorganic spin-Peierls (SP) material CuGeO_3. We observed the disappearance of…

强关联电子 · 物理学 2007-05-23 N. Koide , Y. Uchiyama , T. Hayashi , T. Masuda , Y. Sasago , K. Uchinokura , K. Manabe , H. Ishimoto

We describe the doping effects on a metallic breathing pyrochlore compound, Cr4PtGa17. Upon doping with Sb, i.e., Cr4Pt(Ga1-xSbx)17, it was found that a selective doping on one of the seven Ga sites occurs. With increasing dopant level, the…

材料科学 · 物理学 2024-10-17 Chaoguo Wang , Gina Angelo , Jeremy G. Philbrick , Tai Kong , Xin Gui

An investigation of La and Ca doped Sr4Ru3O10, featuring a coexistence of interlayer ferromagnetism and intralayer metamagnetism, is presented. La doping readily changes magnetism between ferromagnetism and metamagnetism by tuning the…

强关联电子 · 物理学 2009-11-11 S. Chikara , V. Durairaj , W. H. Song , Y. P. Sun , X. N. Lin , A. Douglass , G. Cao , P. Schlottmann

The evolution of the electronic properties of electron-doped (Sr{1-x}La{x})2IrO4 is experimentally explored as the doping limit of La is approached. As electrons are introduced, the electronic ground state transitions from a spin-orbit Mott…

We used a solid-state reaction method to prepare Sn$_{1-x}$Ni$_x$O$_2$ with $x$ = 0, 0.05, 0.1, 0.15 polycrystalline compounds. A rutile phase with tetragonal crystal structure was confirmed by X-ray diffraction. At room temperature, the…

应用物理 · 物理学 2022-06-06 Y. S. Worku , V. V. Srinivasu , Dipti R. Sahu

We study the magnetic susceptibility of mixed-valent La2-xSrxCoO4 single crystals in the doping range of 0.5<= x <= 0.8 for temperatures up to 1000 K. The magnetism below room temperature is described by paramagnetic Co2+ in the high-spin…

强关联电子 · 物理学 2012-04-04 N. Hollmann , M. W. Haverkort , M. Benomar , M. Cwik , M. Braden , T. Lorenz

Erbium-doped crystals offer a versatile platform for hybrid quantum devices because they combine magnetically-sensitive electron-spin transitions with telecom-wavelength optical transitions. At the high doping concentrations necessary for…

The rhodium doping in the LaCo$_{1-x}$Rh$_{x}$O$_3$ perovskite series ($x=0.02-0.5$) has been studied by X-ray diffraction, electric transport and magnetization measurements, complemented by electronic structure GGA+U calculations in…

材料科学 · 物理学 2012-04-04 K. Knížek , J. Hejtmánek , M. Maryško , Z. Jirák , J. Buršík

We have grown single crystals of electron doping system Ca2-xLaxRuO4 (0.00 <= x <= 0.20) by a floating zone method. The first order metal/non-metal transition and canted antiferromagnetic ordering occur for 0.00 < x < 0.15, similar to those…

强关联电子 · 物理学 2009-10-31 Hideto Fukazawa , Yoshiteru Maeno

Magnetic properties of the Sr-doped BaCoO$_3$ are explained on the basis of ab initio calculations and the analysis of experimental literature. Formation of magnetic clusters bigger than in the parent compound and increase in the blocking…

强关联电子 · 物理学 2009-11-11 V. Pardo , J. Rivas , D. Baldomir

The modifications in the electronic structure of Ni_{2+x}Mn_{1-x}Ga by Ni doping have been studied using full potential linearized augmented plane wave method and ultra-violet photoemission spectroscopy. Ni 3d related electron states appear…

材料科学 · 物理学 2009-11-10 Aparna Chakrabarti , C. Biswas , S. Banik , R. S. Dhaka , A. K. Shukla , S. R. Barman

The effects of Co2+ doping on the structural, magnetic and dielectric properties of the multiferroic frustrated antiferromagnet Mn3TeO6 have been investigated. Ceramic samples of the solid solution series Mn3-xCoxTeO6 were prepared by a…

材料科学 · 物理学 2014-04-15 S. A. Ivanov , R. Mathieu , P. Nordblad , C. Ritter , R. Tellgren , N. Golubko , A. Mosunov , E. D. Politova , M. Weil

A comprehensive study of impurity-induced magnetism in nonmagnetically (Mg${}^{2+}$) and magnetically (Co${}^{2+}$) doped PbNi${}_{2}$V${}_{2}$O${}_{8}$ compounds is given, using both macroscopic dc susceptibility and local-probe electron…

强关联电子 · 物理学 2009-11-11 Andrej Zorko , Denis Arčon , Alexandros Lappas , Zvonko Jagličić

Magnetic interaction with the gapless surface states in topological insulator (TI) has been predicted to give rise to a few exotic quantum phenomena. However, the effective magnetic doping of TI is still challenging in experiment. Using…

材料科学 · 物理学 2014-01-06 Jian-Min Zhang , Wenmei Ming , Zhigao Huang , Gui-Bin Liu , Xufeng Kou , Yabin Fan , Kang L. Wang , Yugui Yao

We show for the system La1-xCexCoO3 (0.1 <= x <= 0.4) that it is possible to synthesize electron-doped cobaltites by the growth of epitaxial thin films. For La1-xCexCoO3, ferromagnetic order is observed within the entire doping range (with…

强关联电子 · 物理学 2007-05-23 Dirk Fuchs , Peter Schweiss , Thorsten Schwarz , Rudolf Schneider

We investigate the electronic structure and magnetic properties of a $J_\text{eff} = 1/2$ iridate Ca$_4$IrO$_6$ and the implications of doping electrons and holes using ab initio density functional theory. Our calculations considering…

强关联电子 · 物理学 2022-09-02 Avishek Singh , Jayita Chakraborty , Nirmal Ganguli

We performed nuclear magnetic resonance (NMR) measurements to investigate the evolution of spin-density-wave (SDW) and superconducting (SC) states upon electron doping in CaFe_{1-x}Co_{x}AsF, which exhibits an intermediate phase diagram…

超导电性 · 物理学 2012-10-04 S. Tsutsumi , N. Fujiwara , S. Matsuishi , H. Hosono

We report the results of our investigation of magnetic, thermodynamic and dielectric properties of Ca substituted half-doped orthochromite, Dy0.6Ca0.4Fe0.5Cr0.5O3. Magnetic susceptibility and heat capacity data bring out that this compound…

材料科学 · 物理学 2017-03-29 Mohit K Sharma , Tathamay Basu , K Mukherjee , E V Sampathkumaran