Browsing by Author "Mukhamedshin I."

Sort by: Order: Results:

  • 23Na NMR study of sodium order in Na xCoO 2 with 22 K Néel temperature 
    Alloul H.; Mukhamedshin I.; Dooglav A.; Dmitriev Y.; Ciomaga V.; Pinsard-Gaudart L.; Collin G. (2012)
    We report a systematic study of the c-lattice parameter in the Na xCoO 2 phases versus Na content x>0.5, in which sodium always displays ordered arrangements. This allows us to single out the first phase which exhibits an ...
  • 59Co NMR evidence for charge and orbital order in the kagome-like structure of Na 2/3CoO 2 
    Mukhamedshin I.; Alloul H. (2011)
    We report a complete set of 59Co NMR data taken on the x=2/3 phase of sodium cobaltates Na xCoO 2 for which we have formerly established the in-plane Na ordering and its three-dimensional stacking from a combination of ...
  • Antiferromagnetic properties of a water-vapor-inserted YBa 2Cu3O6.5 compound studied by NMR, NQR, and μSR 
    Dooglav A.; Egorov A.; Mukhamedshin I.; Savinkov A.; Alloul H.; Bobroff J.; MacFarlane W.; Mendels P.; Collin G.; Blanchard N.; Picard P.; King P.; Lord J. (2004)
    We present a detailed NQR, nuclear magnetic resonance (NMR), and μSR study of the magnetic phase obtained during a topotactic chemical reaction of YBa2Cu3O6.5 high-temperature superconductor with low-pressure water vapor. ...
  • Antiferromagnetism in hydrated 123 compounds 
    Dooglav A.; Egorov A.; Mukhamedshin I.; Savinkov A.; Alloul H.; Bobroff J.; MacFarlane W.; Mendels P.; Collin G.; Blanchard N.; Picard P. (1999)
    Copper nuclear quadrupole resonance and zero-field nuclear magnetic resonance (ZFNMR) studies of YBa2Cu3O6.5 show that a magnetic phase appears in underdoped 123 superconductors treated in ambient moist air. The studies ...
  • Cobalt charge states in sodium cobaltates at intermediate dopings 
    Lang G.; Bobroff J.; Alloul H.; Mukhamedshin I.; Collin G.; Blanchard N. (2009)
    A likely crucial parameter in explaining the peculiar magnetism of NaxCoO2 cobaltates in their paramagnetic state is their charge and spin states in the cobalt layers, responsible for the electronic properties. We examine ...
  • Complex magnetic differentiation of cobalts in NaxCoO2 with 22 K Néel temperature 
    Mukhamedshin I.; Gilmutdinov I.; Salosin M.; Alloul H. (2014)
    Single crystals of sodium cobaltates NaxCoO2 with x ≈ 0.8 were grown by the floating zone technique. Using electrochemical Na de-intercalation method we reduced the sodium content in the as-grown crystals down to pure phase ...
  • Contribution of copper Nqr spectroscopy to the geological studies of complex sulfides and oxides 
    Gainov R.; Dooglav A.; Mukhamedshin I.; Evlampiev I.; Orlova A.; Pen'Kov I.; Mozgova N. (2009)
    Many energy-related areas such as nuclear waste isolation, continental drilling, fossil fuel recovery, and geothermal energy are directly associated with an in-depth understanding of the earth sciences. Of particular ...
  • Copper valence, structural separation and lattice dynamics in tennantite (fahlore): NMR, NQR and SQUID studies 
    Gainov R.; Dooglav A.; Pen'kov I.; Mukhamedshin I.; Savinkov A.; Mozgova N. (2008)
    Electronic and magnetic properties of tennantite subfamily of tetrahedrite-group minerals have been studied by copper nuclear quadrupole resonance (NQR), nuclear magnetic resonance (NMR) and SQUID magnetometry methods. The ...
  • Electronic structure and lattice dynamics of domeykite CU3As according to nuclear quadrupolar resonance of 75As and 63,65CU 
    Begaev B.; Dooglav A.; Kal'Chev V.; Krjukov E.; Mukhamedshin I.; Pen'Kov I. (2002)
    The temperature dependences of nuclear quadrupole resonance (NQR) frequencies, the line width and nuclear relaxation of 75As and 63,65Cu, as well as the electrical resistivity in domeykite Cu3As are studied in the temperature ...
  • Evolution of Co charge disproportionation with Na order in NaxCoO2 
    Mukhamedshin I.; Dooglav A.; Krivenko S.; Alloul H. (2014)
    © 2014 American Physical Society. Co59NMR experiments have been performed on single crystals of the layered cobaltate NaxCoO2with x=0.77, which is an antiferromagnet with Néel temperature TN=22 K. In this metallic phase, ...
  • Inhomogeneity of charge and spin distribution in CuO2 layers of high-Tx superconductors: NQR/NMR studies of 1-2-3 compounds 
    Teplov M.; Bakharev O.; Dooglav A.; Egorov A.; Mukhamedshin I.; De Gronckel H.; Alloul H.; Mendels P.; Eremina R. (1999)
    The copper NQR and ZFNMR and thulium NMR are studied in a series of 123 superconductors. It is found that in the aged 60-K superconductors RBa2Cu3O6+x the well known conducting (nonmagnetic) phase co-exists with the ...
  • Intrinsic magnetic centers and microdomains in oxygen-deficient YBa2Cu3O6.5 and TmBa2Cu3O6+x 
    Bakharev O.; Aminov L.; Dooglav A.; Egorov A.; Krjukov E.; Mukhamedshin I.; Naletov V.; Teplov M.; Volodin A.; Witteveen J.; Brom H.; Alloul H. (1997)
    We measured the influence of magnetic centers (MC's) on the nuclear relaxation in 123 compounds using 169Tm NMR and 63Cu NQR in TmBa2Cu3O6+x (x = 0, 0.2, 0.3, 0.4, 0.5, 0.6), and 89Y NMR and 63Cu NQR in YBa2Cu3O65. Particular ...
  • Intrinsic paramagnetic centers in 1-2-3 superconductors 
    Teplov M.; Bakharev O.; Brom H.; Dooglav A.; Egorov A.; Krjukov E.; Marvin O.; Mukhamedshin I.; Naletov V.; Volodin A.; Wagener D.; Witteveen J. (1995)
    The169Tm "enhanced" NMR in TmBa2Cu3O6+x (x=0.5, 0.6) at temperatures below 4.2K and the63Cu(1) NQR in YBa2Cu3O6.5 at temperatures above 4.2K are used to study properties of intrinsic paramagnetic centers incorporated into ...
  • Magnetic and magnetoelastic properties of LiDyF4 single crystals 
    Romanova I.; Korableva S.; Krotov V.; Malkin B.; Mukhamedshin I.; Suzuki H.; Tagirov M. (2013)
    Temperature and magnetic field dependences of the magnetization of LiDyF4 single crystal were measured with a dc-SQUID magnetometer. The longitudinal magnetostriction was measured by the capacitance-bridge method. A giant ...
  • Magnetic properties of the ising dipole ferromagnet LiTbF4 
    Romanova I.; Malkin B.; Mukhamedshin I.; Suzuki H.; Tagirov M. (2002)
    The field and temperature dependences of the magnetization of a LiTbF4 single crystal are measured at temperatures ranging from 2 to 300 K in magnetic fields (up to 5 T) directed parallel and perpendicular to the ...
  • Magnetic resonant and non-resonant investigations of LiLnF4 (Ln = Y, Tm) powders 
    Klochkov A.; Kurzin S.; Mukhamedshin I.; Nabiullin D.; Naletov V.; Suzuki H.; Salikhov I.; Tagirov M.; Tayurskii D.; Zhdanov R. (1998)
    The properties of dielectric powders of the Van Vleck paramagnet LiTmF4 and its diamagnetic analogue LiYF4 have been investigated by both resonant methods (EPR, NMR, and the mass-spectroscopy) and non-resonant ones ...
  • Magnetism and structural phase transitions in LiTmF4 powders 
    Klochkov A.; Naletov V.; Mukhamedshin I.; Tagirov M.; Tayurskiǐ D.; Suzuki H. (1997)
    The field (0-5.5 T) and temperature (2-300 K) dependences of the magnetization of LiTmF4 powders with particle sizes of 1 μm and 56-400 μm are investigated experimentally and theoretically. It is concluded that a transition ...
  • Na atomic order, Co charge disproportionation and magnetism in Na xCoO2 for large Na contents 
    Alloul H.; Mukhamedshin I.; Collin G.; Blanchard N. (2008)
    We have synthesized and characterized four different stable phases of Na ordered NaxCoO2, for 0.65<x<0.8. Above 100 K they display similar Curie-Weiss susceptibilities as well as ferromagnetic q=0 spin fluctuations in the ...
  • Na NMR evidence for charge order and anomalous magnetism in Na xCoO2 
    Mukhamedshin I.; Alloul H.; Collin G.; Blanchard N. (2004)
    The aligned single phase powder samples were provided by the material synthesis and characterization of a sodium (Na) nuclear magnetic resonance (NMR) evidence for change order and anomalous magnetism in NaxCoO 2. Calculations ...
  • Na order and Co charge disproportionation in NaxCoO2 
    Mukhamedshin I.; Alloul H. (2015)
    © 2014 Elsevier B.V. We have synthesized and characterized different stable phases of sodium cobaltates NaxCoO2 with sodium content 0.65<x<0.80. We demonstrate that 23Na NMR allows us to determine the difference in the ...

Search DSpace

Browse

My Account