Zobrazeno 1 - 10
of 212
pro vyhledávání: '"Ratcliff, W"'
Autor:
Stock, C., Roessli, B., Gehring, P. M., Rodriguez-Rivera, J. A., Giles-Donovan, N., Cochran, S., Xu, G., Manuel, P., Gutmann, M. J., Ratcliff, W. D., Fennell, T., Su, Y., Li, X., Luo, H.
Publikováno v:
Phys. Rev. B 106, 144207 (2022)
PbFe$_{1/2}$Nb$_{1/2}$O$_{3}$ (PFN) is a relaxor ferroelectric (T$_{c}$ $\sim$ 400 K) consisting of disordered magnetic Fe$^{3+}$ (S=${5\over2}$, L$\approx$0) ions resulting in a low temperature ``cluster glass" phase (W. Kleemann $\textit{et al.}$ P
Externí odkaz:
http://arxiv.org/abs/2210.15706
Kitaev interactions in the Co honeycomb antiferromagnets Na$_3$Co$_2$SbO$_6$ and Na$_2$Co$_2$TeO$_6$
Autor:
Songvilay, M., Robert, J., Petit, S., Rodriguez-Rivera, J. A., Ratcliff, W. D., Damay, F., Balédent, V., Jiménez-Ruiz, M., Lejay, P., Pachoud, E., Hadj-Azzem, A., Simonet, V., Stock, C.
Publikováno v:
Phys. Rev. B 102, 224429 (2020)
Co$^{2+}$ ions in an octahedral crystal field, stabilise a j$_{eff}$ = 1/2 ground state with an orbital degree of freedom and have been recently put forward for realising Kitaev interactions, a prediction we have tested by investigating spin dynamics
Externí odkaz:
http://arxiv.org/abs/2012.00006
Autor:
Piva, M. M., Tartaglia, R., Freitas, G. S., Souza, J. C., Christovam, D. S., Thomas, S. M., Leão, J. B., Ratcliff, W., Lynn, J. W., Lane, C., Zhu, J. -X., Thompson, J. D., Rosa, P. F. S., Adriano, C., Granado, E., Pagliuso, P. G.
Publikováno v:
Phys. Rev. B 101, 214431 (2020)
We report the electronic and magnetic properties of stoichiometric CeAuBi$_{2}$ single crystals. At ambient pressure, CeAuBi$_{2}$ orders antiferromagnetically below a N\'{e}el temperature ($T_{N}$) of 19 K. Neutron diffraction experiments revealed a
Externí odkaz:
http://arxiv.org/abs/2008.04239
Autor:
Songvilay, M., Giles-Donovan, N., Bari, M., Ye, Z. -G., Minns, J. L., Green, M. A., Xu, Guangyong, Gehring, P. M., Schmalzl, K., Ratcliff, W. D., Brown, C. M., Chernyshov, D., van Beek, W., Cochran, S., Stock, C.
Publikováno v:
Physical Review Materials 3, 093602 (2019)
The acoustic phonons in the organic-inorganic lead halide perovskites have been reported to have anomalously short lifetimes over a large part of the Brillouin zone. The resulting shortened mean free paths of the phonons have been implicated as the o
Externí odkaz:
http://arxiv.org/abs/1908.10093
Autor:
Sarte, P. M., Arévalo-López, A. A., Songvilay, M., Le, D., Guidi, T., García-Sakai, V., Mukhopadhyay, S., Capelli, S. C., Ratcliff, W. D., Hong, K. H., McNally, G. M., Pachoud, E., Attfield, J. P., Stock, C.
Publikováno v:
Phys. Rev. B, 98 224410 (2018)
The antiferromagnetic mixed valence ternary oxide $\alpha$-CoV$_{3}$O$_{8}$ displays disorder on the Co$^{2+}$ site that is inherent to the $Ibam$ space group. The zero field structural and dynamic properties of $\alpha$-CoV$_{3}$O$_{8}$~have been in
Externí odkaz:
http://arxiv.org/abs/1811.00395
Autor:
Songvilay, M., Bari, M., Ye, Z. -G., Xu, Guangyong, Gehring, P. M., Ratcliff, W. D., Schmalzl, K., Bourdarot, F., Roessli, B., Stock, C.
Publikováno v:
Phys. Rev. Materials 2, 123601 (2018)
Lead halide hybrid perovskites consist of an inorganic framework hosting a molecular cation located in the interstitial space. These compounds have been extensively studied as they have been identified as promising materials for photovoltaic applicat
Externí odkaz:
http://arxiv.org/abs/1809.09878
Autor:
Wang, Meng, Wang, Miaoyin, Li, G. N., Huang, Q., Li, C. H., Tan, G. T., Zhang, C. L., Cao, Huibo, Tian, Wei, Zhao, Yang, Chen, Y. C., Lu, X. Y., Sheng, Bin, Luo, H. Q., Li, S. L., Fang, M. H., Zarestky, J. L., Ratcliff, W., Lumsden, M. D., Lynn, J. W., Dai, Pengcheng
Publikováno v:
Phys. Rev. B 84, 094504 (2011)
Neutron diffraction has been used to study the lattice and magnetic structures of the insulating and superconducting Rb$_y$Fe$_{1.6+x}$Se$_2$. For the insulating Rb$_{y}$Fe$_{1.6+x}$Se$_2$, neutron polarization analysis and single crystal neutron dif
Externí odkaz:
http://arxiv.org/abs/1108.2895
Autor:
Adriano, C., Giles, C., Bittar, E. M., Coelho, L. N., de Bergevin, F., Mazzoli, C., Paolasini, L., Ratcliff, W., Bindel, R., Lynn, J. W., Fisk, Z., Pagliuso, P. G.
Publikováno v:
Physical Review B 81, 245115 (2010)
Low temperature magnetic properties of Cd-doped Ce2MIn8 (M = Rh and Ir) single crystals are investigated. Experiments of temperature dependent magnetic susceptibility, heat capacity and electrical resistivity measurements revealed that Cd-doping enha
Externí odkaz:
http://arxiv.org/abs/0912.4467
Autor:
Wen, Jinsheng, Xu, Guangyong, Xu, Zhijun, Lin, Zhi Wei, Li, Qiang, Ratcliff, W., Gu, Genda, Tranquada, J. M.
Publikováno v:
Phys. Rev. B 80, 104506 (2009)
We performed elastic neutron scattering and magnetization measurements on Fe(1.07)Te(0.75)Se(0.25) and FeTe(0.7)Se(0.3). Short-range incommensurate magnetic order is observed in both samples. In the former sample with higher Fe content, a broad magne
Externí odkaz:
http://arxiv.org/abs/0906.3774
Using synchrotron X-rays and neutron diffraction we disentangle spin-lattice order in highly frustrated ZnCr$_2$O$_4$ where magnetic chromium ions occupy the vertices of regular tetrahedra. Upon cooling below 12.5 K the quandary of anti-aligning spin
Externí odkaz:
http://arxiv.org/abs/0905.2127