Salamon, Myron B.

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Myron B. Salamon was Dean of the School of Natural Sciences and Mathematics from 2006-2011. Currently he serves as a Research Scholar and faculty member in the Physics Department. Dr. Salamon is noted for his research in experimental condensed matter physics, phase transitions, superconductivity and the properties of magnetic materials. Learn more about Dr. Salamon on his Faculty and Research Explorer pages.


Recent Submissions

Now showing 1 - 5 of 5
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    Missing Magnetism in Sr₄Ru₃O₁₀: Indication for Antisymmetric Exchange Interaction
    (Nature Publishing Group, 2018-09-24) Weickert, Franziska; Civale, Leonardo; Maiorov, Boris; Jaime, Marcelo; Salamon, Myron B.; Carleschi, Emanuela; Strydom, Andre M.; Fittipaldi, Rosalba; Granata, Veronica; Vecchione, Antonio; Salamon, Myron B.
    Metamagnetism occuring inside a ferromagnetic phase is peculiar. Therefore, Sr₄Ru₃O₁₀, a T_C = 105 K ferromagnet, has attracted much attention in recent years, because it develops a pronounced metamagnetic anomaly below T_C for magnetic fields applied in the crystallographic ab-plane. The metamagnetic transition moves to higher fields for lower temperatures and splits into a double anomaly at critical fields H_{c1} = 2.3 T and H_{c2} = 2.8 T, respectively. Here, we report a detailed study of the different components of the magnetization vector as a function of temperature, applied magnetic field, and varying angle in Sr₄Ru₃O₁₀. We discover for the first time a reduction of the magnetic moment in the plane of rotation at the metamagnetic transition. The anomaly shifts to higher fields by rotating the field from H ⟂ c to H ∥ c. We compare our experimental findings with numerical simulations based on spin reorientation models taking into account magnetocrystalline anisotropy, Zeeman effect and antisymmetric exchange interactions. While Magnetocrystalline anisotropy combined with a Zeeman term are sufficient to explain a metamagnetic transition in Sr₄Ru₃O₁₀, a Dzyaloshinskii-Moriya term is crucial to account for the reduction of the magnetic moment as observed in the experiments.
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    Upper Critical Field and Kondo Effects in Fe(Te{0.9} Se{0.1}) Thin Films by Pulsed Field Measurements
    (Nature Publishing Group, 2016-02-10) Salamon, Myron B.; Cornell, N.; Jaime, M.; Balakirev, F. F.; Zakhidov, Anvar A.; Huang, J.; Wang, H.; 0000 0001 0965 7058 (Salamon, MB); 0000-0003-3983-2229 (Zakhidov, AA); Salamon, Myron B.; Zakhidov, Anvar A.
    The transition temperatures of epitaxial films of Fe(Te{0.9} Se {0.1}) are remarkably insensitive to applied magnetic field, leading to predictions of upper critical fields B{c2}(T = 0) in excess of 100 T. Using pulsed magnetic fields, we find B{c2}(0) to be on the order of 45 T, similar to values in bulk material and still in excess of the paramagnetic limit. The same films show strong magnetoresistance in fields above B{c2}(T), consistent with the observed Kondo minimum seen above T{c}. Fits to the temperature dependence in the context of the WHH model, using the experimental value of the Maki parameter, require an effective spin-orbit relaxation parameter of order unity. We suggest that Kondo localization plays a similar role to spin-orbit pair breaking in making WHH fits to the data.
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    Magnetic Nanopantograph in the SrCu₂(BO₃)₂ Shastry-Sutherland Lattice
    (National Academy of Sciences, 2015-02-02) Radtke, Guillaume; Saúl, Andrés; Dabkowska, Hanna A.; Salamon, Myron B.; Jaime, Marcelo; 0000 0001 0965 7058 (Salamon, MB); 79014293 (Salamon, MB); Salamon, Myron B.
    Magnetic materials having competing, i.e., frustrated, interactions can display magnetism prolific in intricate structures, discrete jumps, plateaus, and exotic spin states with increasing applied magnetic fields. When the associated elastic energy cost is not too expensive, this high potential can be enhanced by the existence of an omnipresent magnetoelastic coupling. Here we report experimental and theoretical evidence of a nonnegligible magnetoelastic coupling in one of these fascinating materials, SrCu₂(BO₃)₂ (SCBO). First, using pulsed-field transversal and longitudinal magnetostriction measurements we show that its physical dimensions, indeed, mimic closely its unusually rich field-induced magnetism. Second, using density functional-based calculations we find that the driving force behind the magnetoelastic coupling is the CuOCu superexchange angle that, due to the orthogonal Cu²⁺ dimers acting as pantographs, can shrink significantly (0.44%) with minute (0.01%) variations in the lattice parameters. With this original approach we also find a reduction of ~10% in the intradimer exchange integral J, enough to make predictions for the highly magnetized states and the effects of applied pressure on SCBO.
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    Penetration Depth Study of LaOs 4Sb 12: Multiband S-Wave Superconductivity
    (2012-08-17) Tee, X. Y.; Luo, H. G.; Xiang, T.; Vandervelde, D.; Salamon, Myron Ben, 1939-; Sugawara, H.; Sato, H.; 0000 0001 0965 7058 (Salamon, MB); 79014293 (Salamon, MB); Salamon, Myron B.
    We measured the magnetic penetration depth λ(T) in single crystals of LaOs 4Sb 12 (T c=0.74 K) down to 85 mK using a tunnel-diode-oscillator technique. The observed low-temperature exponential dependence indicates an s-wave gap. Fitting the low-temperature data to a BCS s-wave expression gives the zero-temperature gap value Δ(0)=(1. 34±0.07)k BT c which is significantly smaller than the BCS value of 1.76k BT c. In addition, the normalized superfluid density ρ(T) shows an unusually long suppression near T c and is best fit by a two-band s-wave model. © 2012 American Physical Society.
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    Reversible superconductivity in electrochromic indium-tin oxide films
    (American Institute of Physics, 2012-12-19) Aliev, Ali E.; Xiong, K.; Cho, K.; Salamon, Myron Ben, 1939-; 0000 0001 0965 7058 (Salamon, MB); 79014293 (Salamon, MB); Salamon, Myron B.
    Transparent conductive indium tin oxide (ITO) thin films, electrochemically intercalated with sodium or other cations, show tunable superconducting transitions with a maximum Tc at 5 K. The transition temperature and the density of states, D(EF) (extracted from the measured Pauli susceptibility χp) exhibit the same dome shaped behavior as a function of electron density. Optimally intercalated samples have an upper critical field ≈ 4 T and Δ/kBTc ≈ 2.0. Accompanying the development of superconductivity, the films show a reversible electrochromic change from transparent to colored and are partially transparent (orange) at the peak of the superconducting dome. This reversible intercalation of alkali and alkali earth ions into thin ITO films opens diverse opportunities for tunable, optically transparent superconductors.

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