Zobrazeno 1 - 10
of 574
pro vyhledávání: '"Attfield, J. P."'
Autor:
Lane, H., Sarte, P. M., Guratinder, K., Arevalo-Lopez, A. M., Perry, R. S., Hunter, E. C., Weber, T., Roessli, B., Stunault, A., Su, Y., Ewings, R. A., Wilson, S. D., Böni, P., Attfield, J. P., Stock, C.
Publikováno v:
Phys. Rev. Research 5, 043146 (2023)
MgV$_{2}$O$_{4}$ is a spinel based on magnetic V$^{3+}$ ions which host both spin ($S=1$) and orbital ($l_{eff}=1$) moments. Owing to the underlying pyrochlore coordination of the magnetic sites, the spins in MgV$_{2}$O$_{4}$ only antiferromagnetical
Externí odkaz:
http://arxiv.org/abs/2309.06853
Autor:
Kim, Taehun, Sim, Sangwoo, Lim, Sumin, Patino, Midori Amano, Hong, Jaeyoung, Lee, Jisoo, Hyeon, Taeghwan, Shimakawa, Yuichi, Lee, Soonchil, Attfield, J. Paul, Park, Je-Geun
Magnetite (Fe3O4) is of fundamental importance as the original magnetic material and also for the Verwey transition near T_V = 125 K, below which a complex lattice distortion and electron orders occur. The Verwey transition is suppressed by strain or
Externí odkaz:
http://arxiv.org/abs/2110.01817
Autor:
Lane, H., Rodriguez, E. E., Walker, H. C., Niedermayer, Ch., Stuhr, U., Bewley, R. I., Voneshen, D. J., Green, M. A., Rodriguez-Rivera, J. A., Fouquet, P., Cheong, S. -W., Attfield, J. P., Ewings, R. A., Stock, C.
Publikováno v:
Phys. Rev. B 104, 104404 (2021)
CaFe$_{2}$O$_{4}$ is an $S=5/2$ antiferromagnet exhibiting two magnetic orders which shows regions of coexistence at some temperatures. Using a Green's function formalism, we model neutron scattering data of the spin wave excitations in this material
Externí odkaz:
http://arxiv.org/abs/2108.09679
Autor:
Lane, H., Pachoud, E., Rodriguez-Rivera, J. A., Songvilay, M., Xu, G., Gehring, P. M., Attfield, J. P., Ewings, R. A., Stock, C.
Publikováno v:
Phys. Rev. B 104, L020411 (2021)
VI$_{3}$ is a ferromagnet with planar honeycomb sheets of bonded V$^{3+}$ ions held together by van der Waals forces. We apply neutron spectroscopy to measure the two dimensional ($J/J_{c} \approx 17$) magnetic excitations in the ferromagnetic phase,
Externí odkaz:
http://arxiv.org/abs/2107.04311
Publikováno v:
J. Appl. Cryst. (2021). 54, 957 (2021)
An instrument and software algorithm is described for the purpose of characterization of large single crystals at the Alignment Facility (ALF) of the ISIS spallation neutron source. We describe a method for both characterizing the quality of the samp
Externí odkaz:
http://arxiv.org/abs/2104.10137
Autor:
Gomez, S. J., Sarte, P. M., Zelensky, M., Hallas, A. M., Gonzalez, B. A., Hong, K. H., Pace, E. J., Calder, S., Stone, M. B., Su, Y., Feng, E., Le, M. D., Stock, C., Attfield, J. P., Wilson, S. D., Wiebe, C. R., Aczel, A. A.
Publikováno v:
Phys. Rev. B 103, 214419 (2021)
Nd-based pyrochlore oxides of the form Nd$_{2}B_{2}$O$_{7}$ have garnered a significant amount of interest owing to the moment fragmentation physics observed in Nd$_{2}$Zr$_{2}$O$_{7}$ and speculated in Nd$_{2}$Hf$_{2}$O$_{7}$. Notably this phenomeno
Externí odkaz:
http://arxiv.org/abs/2104.00791
Autor:
Edwards, L., Lane, H., Arevalo-Lopez, A. M., Songvilay, M., Pachoud, E., Niedermayer, Ch., Tucker, G., Manuel, P., Paulsen, C., Lhotel, E., Attfield, J. P., Giblin, S. R., Stock, C.
$\alpha$-CoV$_{2}$O$_{6}$ consists of $j_{\mathrm{eff}}={1 \over 2}$ Ising spins located on an anisotropic triangular motif with magnetization plateaus in an applied field. We combine neutron diffraction with low temperature magnetization to investig
Externí odkaz:
http://arxiv.org/abs/2010.14097
Autor:
Murota, K., Pachoud, E., Attfield, J. P., Glaum, R., Yasuda, T., Ootsuki, D., Takagi, Y., Yasui, A., Khomskii, D. I., Mizokawa, T.
Publikováno v:
Phys. Rev. B 101, 235159 (2020)
Electronic properties of V$_2$OPO$_4$ have been investigated by means of hard x-ray photoemission spectroscopy (HAXPES) and subsequent theoretical calculations. The V 1$s$ and 2$p$ HAXPES spectra are consistent with the charge ordering of V$^{2+}$ an
Externí odkaz:
http://arxiv.org/abs/2006.04341
Autor:
Murota, Kota, Pachoud, Elise, Attfield, J. Paul, Glaum, Robert, Sutarto, Ronny, Takubo, Kou, Khomskii, Daniel I., Mizokawa, Takashi
Publikováno v:
Phys. Rev. B 101, 245106 (2020)
V 3$d$ charge and orbital states in V$_2$OPO$_4$ have been investigated by means of x-ray absorption spectroscopy (XAS). The electronic structure of V$_2$OPO$_4$ is very unique in that the charge transfer between V$^{2+}$ and V$^{3+}$ in face sharing
Externí odkaz:
http://arxiv.org/abs/2002.00337
Publikováno v:
J. Phys. Condens. Matter 32, 374011 (2020)
Motivated by the presence of an unquenched orbital angular momentum in CoO, a team at Chalk River, including a recently hired research officer Roger Cowley, performed the first inelastic neutron scattering experiments on the classic Mott insulator [S
Externí odkaz:
http://arxiv.org/abs/2001.10923