B. Barbara

Institut Néel

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Wolfgang Wernsdorfer

Karlsruhe Institute of Technology

M.F. Rossignol

TU Wien

D. Mailly

Centre National de la Recherche Scientifique

B. Z. Malkin

Kazan Federal University

A. Benoı̂t

Centre National de la Recherche Scientifique

K. Hasselbach

Institut Néel

V. S. Amaral

University of Aveiro

Jean-Baptiste Filippi

Centre National de la Recherche Scientifique

S. Mangin

Institut Jean Lamour

J. B. Sousa

Administração Regional de Saúde de Lisboa e Vale do Tejo

Cooperative Institutions

Centre National de la Recherche Scientifique

175

Institut Néel

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Université Joseph Fourier

CEA Grenoble

Université Grenoble Alpes

Institut polytechnique de Grenoble

Laboratoire National des Champs Magnétiques Intenses

Université Claude Bernard Lyon 1

Institut Nanosciences et Cryogénie

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Optical Search for QED vacuum magnetic birefringence, Axions and photon Regeneration

P. Pugnat G. Vitrant J. Zicha Jan Hošek Y. Souche

Source

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Citations (7)

Surface and bulk valence of Y0.9Yb0.1Al2 and La0.9Yb0.1Al2

Journal of Applied Physics (1984)

T. Penney B. Reihl R. A. Pollak B. Barbara T. S. Plaskett

Photoemission and susceptibility measurements have been made on alloys of 10% YbAl2 with 90% YAl2 or LaAl2. Similar to YbAl2, Yb in the YAl2 host is intermediate valent in the bulk consistent with a single ion picture. Yb in the LaAl2 host has a valence of 2.0–2.1 in the bulk. In both cases the surface is completely divalent and the surface 4f emission is shifted to higher binding energies relative to the bulk 4f emission.

Divalent

10.1063/1.333537

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Citations (7)

Photon-assisted tunneling in aFe8single-molecule magnet

Physical review. B, Condensed matter (2003)

Lorenzo Sorace Wolfgang Wernsdorfer C. Thirion A.-L. Barra Mirko Pacchioni

The low temperature spin dynamics of a Fe8 Single-Molecule Magnet was studied under circularly polarized electromagnetic radiation allowing us to establish clearly photon-assisted tunneling. This effect, while linear at low power, becomes highly non-linear above a relatively low power threshold. This non-linearity is attributed to the nature of the coupling of the sample to the thermostat.These results are of great importance if such systems are to be used as quantum computers.

10.1103/physrevb.68.220407

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Citations (60)

Non-Thermal Viscosity in the Magnetic Relaxation of 2 d Random Magnets

EPL (Europhysics Letters) (1993)

J. Tejada X. X. Zhang Ll. Balcells Òscar Iglesias B. Barbara

2d random magnetic behaviour has been observed in several rare-earth-transition-metal multilayers. The magnetic relaxation in these systems is independent of temperature at low temperatures. This effect is discussed in terms of current theories for quantum nucleation in ferromagnets.

Magnetic Relaxation

10.1209/0295-5075/22/3/009

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Citations (9)

Rabi oscillations of pinned solitons in spin chains: A route to quantum computation and communication

Physical Review B (2014)

Sylvain Bertaina Charles‐Emmanuel Dutoit Johan van Tol Martin Dressel B. Barbara

We provide evidence for the coherence and Rabi oscillations of spin solitons pinned by the local breaking of translational symmetry in isotropic Heisenberg chains (simple antiferromagnetic N\'eel or spin Peierls). We show that these correlated spin systems that are made of hundreds of coupled spins bear an overall spin $S=1/2$ and can be manipulated as a single spin. This is clearly contrary to known spin qubits which are paramagnetic centers, highly diluted to prevent decoherence. These results offer an alternative approach for spin qubits, paving the way for the implementation of a different type of quantum computer.

Rabi cycle

Spin wave

10.1103/physrevb.90.060404

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Citations (22)

Universal Conductance Fluctuations in Epitaxial GaMnAs Ferromagnets: Dephasing by Structural and Spin Disorder

Physical Review Letters (2007)

L. Vila R. Giraud L. Thevenard A. Lemaı̂tre F. Pierre

Mesoscopic transport measurements reveal a large effective phase coherence length in epitaxial GaMnAs ferromagnets, contrary to usual 3d-metal ferromagnets. Universal conductance fluctuations of single nanowires are compared for epilayers with a tailored anisotropy. At large magnetic fields, quantum interferences are due to structural disorder only, and an unusual behavior related to hole-induced ferromagnetism is evidenced, for both quantum interferences and decoherence. At small magnetic fields, phase coherence is shown to persist down to zero field, even in presence of magnons, and an additional spin disorder contribution to quantum interferences is observed under domain walls nucleation.

Mesoscopic physics

Dephasing

Magnon

10.1103/physrevlett.98.027204

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Citations (41)

Laser-polarimetric measurements of magnetic ac-susceptibility in LiYF4: Ho3+ crystals

Optics and Spectroscopy (2008)

B. Barbara V. S. Zapasskiĭ G. G. Kozlov B. Z. Malkin M. V. Vanyunin

Holmium

10.1134/s0030400x08020124

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Citations (3)

Magnetization of single magnetic particles

Journal of Magnetism and Magnetic Materials (1995)

Wolfgang Wernsdorfer K. Hasselbach D. Mailly B. Barbara A. Benoı̂t

Magnetization dynamics

10.1016/0304-8853(94)01509-0

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Citations (13)

Magneto-optical four-wave mixing transients in garnets

Optica (2017)

M. Barthelemy M. Vomir M. Sanches Piaia Hélène Vonesch P. Molho

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not.The documents may come from teaching and research institutions in France or abroad, or from public or private research centers.L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

Four-wave mixing

Magneto

10.1364/optica.4.000060

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Citations (1)

Coherent manipulation of dipolar coupled spins in an anisotropic environment

Physical Review B (2014)

E. I. Baibekov Marat Gafurov Д. Г. Зверев I. N. Kurkin B. Z. Malkin

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 background results in anisotropic $g$ tensor and thus modifies the dipolar coupling. We develop a microscopic theory of spin relaxation in a transient regime for the frequently encountered case of axially symmetric crystal field. The calculated decoherence rate is nonlinear in the Rabi frequency. We show that the direction of a static magnetic field that corresponds to the highest spin $g$ factor is preferable in order to obtain a higher number of coherent qubit operations. The results of calculations are in excellent agreement with our experimental data on Rabi oscillations recorded for a series of $\mathrm{CaW}{\mathrm{O}}_{4}$ crystals with different concentrations of $\mathrm{N}{\mathrm{d}}^{3+}$ ions.

Rabi cycle

Rabi frequency

Crystal (programming language)

10.1103/physrevb.90.174402

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Citations (10)