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A.C. susceptibility as a probe of low-frequency magnetic dynamics

Publikováno v: J. Phys.: Condens. Matter 31, 013001 (2019)

The experimental technique of a.c. susceptibility can be used as a probe of magnetic dynamics in a wide variety of systems. Its use is restricted to the low-frequency regime and thus is sensitive to relatively slow processes. Rather than measuring th

Externí odkaz: http://arxiv.org/abs/2203.00989

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Spin dynamics and field-induced magnetic phase transition in the honeycomb Kitaev magnet ${\alpha}$-Li$_2$IrO$_3$

Autor: Choi, Sungkyun, Manni, S., Singleton, J., Topping, C. V., Lancaster, T., Blundell, S. J., Adroja, D. T., Zapf, V., Gegenwart, P., Coldea, R.

Publikováno v: Phys. Rev. B 99, 054426 (2019)

The layered honeycomb iridate $\alpha$-Li$_2$IrO$_3$ displays an incommensurate magnetic structure with counterrotating moments on nearest-neighbor sites, proposed to be stabilized by strongly-frustrated anisotropic Kitaev interactions between spin-o

Externí odkaz: http://arxiv.org/abs/1810.03212

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Evidence for $J_{\rm eff} = 0$ ground state and defect-induced spin glass behaviour in the pyrochlore osmate Y$_{2}$Os$_{2}$O$_{7}$

Autor: Davies, N. R., Topping, C. V., Jacobsen, H., Princep, A. J., Kirschner, F. K. K., Rahn, M. C., Bristow, M., Vale, J. G., da Silva, I., Baker, P. J., Sahle, Ch. J., Guo, Y. -F., Yan, D. -Y., Shi, Y. -G., Blundell, S. J., McMorrow, D. F., Boothroyd, A. T.

Publikováno v: Phys. Rev. B 99, 174442 (2019)

We present AC and DC magnetometry, heat capacity, muon spin relaxation ($\mu$SR) and resonant inelastic X-ray scattering (RIXS) studies of the pyrochlore osmate Y$_2$Os$_2$O$_7$. We observe a non-zero effective moment governed by $\sqrt{f}\mu_{\rm{ef

Externí odkaz: http://arxiv.org/abs/1808.01530

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Coexistence of magnetism and superconductivity in separate layers of the iron-based superconductor Li_{1-x}Fe_{x}(OH)Fe_{1-y}Se

Autor: Topping, C. V., Kirschner, F. K. K., Blundell, S. J., Baker, P. J., Woodruff, D. N., Schild, F., Sun, H., Clarke, S. J.

The magnetic properties attributed to the hydroxide layer of Li1-xFex(OH)Fe1-ySe have been elucidated by the study of superconducting and nonsuperconducting members of this family. Both ac magnetometry and muon spin relaxation measurements of nonsupe

Externí odkaz: http://arxiv.org/abs/1704.01492

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Adiabatic physics of an exchange-coupled spin-dimer system: magnetocaloric effect, zero-point fluctuations, and possible two-dimensional universal behavior

Autor: Brambleby, J., Goddard, P. A., Singleton, J., Jaime, M., Lancaster, T., Huang, L., Wosnitza, J., Topping, C. V., Carreiro, K. E., Tran, H. E., Manson, Z. E., Manson, J. L.

We present the magnetic and thermal properties of the bosonic-superfluid phase in a spin-dimer network using both quasistatic and rapidly-changing pulsed magnetic fields. The entropy derived from a heat-capacity study reveals that the pulsed-field me

Externí odkaz: http://arxiv.org/abs/1610.08661

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Controlling magnetic order and quantum disorder in one- and zero-dimensional molecule-based magnets

We investigate the structural and magnetic properties of two molecule-based magnets synthesized from the same starting components. Their different structural motifs promote contrasting exchange pathways and consequently lead to markedly different mag

Externí odkaz: http://arxiv.org/abs/1311.7614

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