Research in ultrahigh magnetic field physics

Boriskov, G. V.; Bykov, A. I.; Dolotenko, M.I.; Egorov, N. I.; Kudasov, Yu. B.; Platonov, V.V.; Селемир, В. Д.; Tatsenko, O. M.

doi:10.3367/ufne.0181.201104n.0441

Cited by 26 publications

(8 citation statements)

References 39 publications

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“…The study of plasmas in strong magnetic fields is relevant to basic and applied plasma physics, astrophysics, controlled fusion, and Z-pinch physics [1][2][3][4][5][6]. Multi-MG magnetic fields can be generated by magnetic-flux compression using high explosive [7] or a pulsed-power machine [8]. Magnetic fields of 10-20 MG have been applied in the investigations of solids and semiconductors and for isentropic compression.…”

mentioning

confidence: 99%

Generation of disc-like plasma from laser-matter interaction in the presence of a strong external magnetic field

Иванов

Maximov

Betti

et al. 2017

Plasma Phys. Control. Fusion

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Dynamics of laser produced plasma in a strong magnetic field was studied using a 1 MA pulsed power generator coupled to an intense, high-energy laser. A 2-2.5 MG magnetic field was generated on the surface of a rod load 0.8-1.2 mm in diameter. A sub-nanosecond laser pulse with intensity of 3×10 15 W cm −2 was focused on the rod load surface. Side-on laser diagnostics showed the generation of two collimated jets 1-3 mm long on the front and rear sides of the load. End-on laser diagnostics reveal that the laser produced plasma in the MG magnetic field takes the form of a thin disc as the plasma propagates along the magnetic field lines. The disc-like plasma expands radially across the magnetic field with a velocity of 250 km s −1 . An electron temperature of 400 eV was measured in the laser-produced plasma on the rod load.

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confidence: 99%

Generation of disc-like plasma from laser-matter interaction in the presence of a strong external magnetic field

Иванов

Maximov

Betti

et al. 2017

Plasma Phys. Control. Fusion

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“…The proposed approach can be used for accurate estimation of exchange parameters of a growing family of spin-1=2 triangular-lattice AFs, including organic compounds (see [10][11][12][13] and references therein); those investigations via conventional neutron-scattering techniques are rather challenging. The employment of very high magnetic fields (up to ca 70 T [34,35] and above [36][37][38], currently available for pulsed-field magnetospectroscopy) as well as the rapid progress in the THz techniques makes the proposed method of crucial importance for investigating spin systems with large J=k B . The approach has a broader impact and can be potentially used for any quantum magnet with reduced (e.g., by the staggered DM interaction) translational symmetry, resulting, as predicted, in emergence of a new exchange mode above H sat .…”

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confidence: 99%

Direct Determination of Exchange Parameters inCs2CuBr4andCs2<

et al. 2014

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Spin-1/2 Heisenberg antiferromagnets Cs2CuCl4 and Cs2CuBr4 with distorted triangular-lattice structures are studied by means of electron spin resonance spectroscopy in magnetic fields up to the saturation field and above. In the magnetically saturated phase, quantum fluctuations are fully suppressed, and the spin dynamics is defined by ordinary magnons. This allows us to accurately describe the magnetic excitation spectra in both materials and, using the harmonic spin-wave theory, to determine their exchange parameters. The viability of the proposed method was proven by applying it to Cs2CuCl4, yielding J/kB=4.7(2) K, J'/kB=1.42(7) K, [J'/J≃0.30] and revealing good agreement with inelastic neutron-scattering results. For the isostructural Cs2CuBr4, we obtain J/kB=14.9(7) K, J'/kB=6.1(3) K, [J'/J≃0.41], providing exact and conclusive information on the exchange couplings in this frustrated spin system.

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“…A magnetic flux compression technique is the only possibility to investigate transport and magnetic properties of substances at 300 T and above [23]. The fast flux compression is realized by means of high explosives (HEC) [24] or ponderomotive electromagnetic forces (EMC) [25]. The both approaches were used in the investigations of FeSi: the first one was implemented in MC-1 generator, which was used in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…It is very similar to that of EMC facility. It showld be mentioned that the ultrahigh magnetic field generation is accompanied by intensive electromagnetic noises, and, that is why, a choice of measuring methods is greatly limited [24].…”

Section: Introductionmentioning

confidence: 99%

On semiconductor--metal transition in FeSi induced by ultrahigh magnetic field

Kudasov¹,

Maslov²

2023

Preprint

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At low temperatures, iron monosilicide is a strongly correlated narrow-gap semiconductor. A first order transition to metal state induced by magnetic field was observed for the first time at 355 T in Ref. [Yu. B. Kudasov et al., JETP Lett. 68 (1998) 350]. However, recently a smooth transition from 230 T to 270 T was found under similar conditions in Ref. [D. Nakamura et al., Phys. Rev. Lett. 127 (2021) 156601]. This discrepancy goes far beyond experimental errors and deserves a careful study. A methodological analysis of inductive and RF techniques of conductivity measurements shows that the difference of these critical magnetic field estimations stems from a divergence in dynamic ranges of the techniques. In fact, the above mentioned methods supplement each other. The semiconductor-metal transition under magnetic field in FeSi is a complex phenomenon which occurs at the wide range of magnetic fields.

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Research in ultrahigh magnetic field physics

Cited by 26 publications

References 39 publications

Generation of disc-like plasma from laser-matter interaction in the presence of a strong external magnetic field

Generation of disc-like plasma from laser-matter interaction in the presence of a strong external magnetic field

Direct Determination of Exchange Parameters inCs2CuBr4andCs2<

On semiconductor--metal transition in FeSi induced by ultrahigh magnetic field

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