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Просмотр по автору "Barbara B."

Просмотр по автору "Barbara B."

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  • 19F nuclear spin relaxation and spin diffusion effects in the single-ion magnet LiYF 4:Ho 3+ 
    Malkin B.; Vanyunin M.; Graf M.; Lago J.; Borsa F.; Lascialfari A.; Tkachuk A.; Barbara B. (2008)
    Temperature and magnetic field dependences of the 19F nuclear spin-lattice relaxation in a single crystal of LiYF 4 doped with holmium are described by an approach based on a detailed consideration of the magnetic dipole-dipole ...
  • Broadening of paramagnetic resonance lines by charged point defects in neodymium-doped scheelites 
    Baibekov E.; Zverev D.; Kurkin I.; Rodionov A.; Malkin B.; Barbara B. (2014)
    We study paramagnetic resonance linewidth in a series of CaWO4 and CaMoO4 crystals with different concentrations of neodymium ions (0.0031-0.81 at %). Experimental data are interpreted in the framework of the statistical ...
  • Coherent manipulation of dipolar coupled spins in an anisotropic environment 
    Baibekov E.; Gafurov M.; Zverev D.; Kurkin I.; Malkin B.; Barbara B. (2014)
    © 2014 American Physical Society. We study coherent dynamics in a system of dipolar coupled spin qubits diluted in a solid and subjected to a driving microwave field. In the case of rare earth ions, an anisotropic crystal ...
  • Coherent spin dynamics in a gadolinium-doped CaW O4 crystal 
    Baibekov E.; Gafurov M.; Zverev D.; Kurkin I.; Rodionov A.; Malkin B.; Barbara B. (2017)
    © 2017 American Physical Society.We report the first observation of Rabi oscillations in the spin-7/2 ensemble of trivalent gadolinium ions hosted in CaWO4 single crystal. A number of transitions within the lowest electronic ...
  • Coherent spin manipulations in Yb3+: CaWO4 at X - And W -band EPR frequencies 
    Rakhmatullin R.; Kurkin I.; Mamin G.; Orlinskii S.; Gafurov M.; Baibekov E.; Malkin B.; Gambarelli S.; Bertaina S.; Barbara B. (2009)
    Coherent spin dynamics of impurity Yb3+ ions in the CaWO4 single crystal has been studied using X - and W -band EPR. Rabi oscillations of the sample magnetization with damping times comparable to their period, driven by ...
  • Cross-relaxation and phonon bottleneck effects on magnetization dynamics in LiY F4: Ho3+ 
    Bertaina S.; Barbara B.; Giraud R.; Malkin B.; Vanuynin M.; Pominov A.; Stolov A.; Tkachuk A. (2006)
    Frequency and dc magnetic field dependences of dynamic susceptibility in diluted paramagnets LiY F4: Ho3+ have been measured at liquid helium temperatures in ac and dc magnetic fields parallel to the symmetry axis of a ...
  • Decoherence window and electron-nuclear cross relaxation in the molecular magnet V 15 
    Shim J.; Bertaina S.; Gambarelli S.; Mitra T.; Müller A.; Baibekov E.; Malkin B.; Tsukerblat B.; Barbara B. (2012)
    Rabi oscillations in the V 15 single molecule magnet embedded in the surfactant (CH 3) 2[CH 3(CH 2) 16CH 2] 2N + have been studied at different microwave powers. An intense damping peak is observed when the Rabi frequency ...
  • Direct measurements of anticrossings of the electron-nuclear energy levels in LiYF4:Ho3+ with submillimeter EPR spectroscopy 
    Shakurov G.; Vanyunin M.; Malkin B.; Barbara B.; Abdulsabirov R.; Korableva S. (2005)
    The electron paramagnetic resonance (EPR) spectra of impurity Ho 3+ ions in monocrystals LiYF4:Ho3+ (0.1 and 1%) with the natural abundance of 6Li (7.42%) and 7Li (92.58%) isotopes, and in the sample 7LiYF4:Ho 3+ (0.1%) ...
  • Environmental effects on quantum relaxation and coherent dynamics in rare-earths ions 
    Barbara B.; Bertaina S.; Gambarelli S.; Giraud R.; Stepanov A.; Malkin B.; Tkachuk A. (2007)
    This work provides new developments of the field of spin dynamics in mesoscopic systems. We first discuss, by a few examples, how environmental degrees of freedom affect tunneling and subsequent slow quantum relaxation of ...
  • Evolution of spin relaxation processes in LiY 1-xHo xF 4 studied via ac-susceptibility and muon spin relaxation 
    Johnson R.; Malkin B.; Lord J.; Giblin S.; Amato A.; Baines C.; Lascialfari A.; Barbara B.; Graf M. (2012)
    We present measurements of magnetic field and frequency dependence of the low-temperature (T = 1.8 K) ac-susceptibility and temperature and field dependence of the longitudinal field positive muon spin relaxation (μSR) for ...
  • Laser-polarimetric measurements of magnetic ac-susceptibility in LiYF 4: Ho3+ crystals 
    Barbara B.; Zapasskii V.; Kozlov G.; Malkin B.; Vanyunin M.; Reǐterov V. (2008)
    Laser-polarimetric technique with the shot-noise-limited polarimetric sensitivity is used to study magnetic ac-susceptibility in holmium doped LiYF4 crystals in the range of Zeeman energies comparable with that of the ...
  • Rare-earth solid-state qubits 
    Bertaina S.; Gambarelli S.; Tkachuk A.; Kurkin I.; Malkin B.; Stepanov A.; Barbara B. (2007)
    Quantum bits (qubits) are the basic building blocks of any quantum computer. Superconducting qubits have been created with a top-down approach that integrates superconducting devices into macroscopic electrical circuits, ...
  • Relaxation rates of magnetization in LiYF4:Ho3+ crystals 
    Malkin B.; Vanyunin M.; Barbara B.; Bertaina S. (2008)
    Theory of magnetization relaxation in a diluted paramagnet based on calculations of relaxation rates due to electron-phonon coupling and magnetic dipole-dipole interactions is developed. Assuming fast establishment of ...
  • Spin-Orbit qubits of rare-Earth-Metal ions in axially symmetric crystal fields 
    Bertaina S.; Shim J.; Gambarelli S.; Malkin B.; Barbara B. (2009)
    Contrary to the well-known spin qubits, rare-earth-metal qubits are characterized by a strong influence of crystal field due to large spin-orbit coupling. At low temperature and in the presence of resonance microwaves, it ...
  • μsR study of spin dynamics in LiY1-xHoxF 4 
    Johnson R.; Chen K.; Giblin S.; Lord J.; Amato A.; Baines C.; Barbara B.; Malkin B.; Graf M. (2011)
    We present zero-field positive muon spin relaxation (μSR) measurements for LiY1-xHoxF4 samples with x = 0.0017, 0.0085, 0.0406, and 0.0855. We characterize the dynamics associated with the formation of the (F-μ-F)- complex ...

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