Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Dahlberg, M. L."'
Autor:
Gaulin, B. D., Kermarrec, E., Dahlberg, M. L., Matthews, M. J., Bert, F., Zhang, J., Mendels, P., Fritsch, K., Granroth, G. E., Jiramongkolchai, P., Amato, A., Baines, C., Cava, R. J., Schiffer, P.
Publikováno v:
Physical Review B 91, 245141 (2015)
Solid-solutions of the "soft" quantum spin ice pyrochlore magnets Tb2B2O7 with B=Ti and Sn display a novel magnetic ground state in the presence of strong B-site disorder, characterized by a low susceptibility and strong spin fluctuations to temperat
Externí odkaz:
http://arxiv.org/abs/1506.05915
Publikováno v:
Physical Review B 83, 140410(R) (2011)
We have probed the low temperature magnetic behavior of the ordered spin ice material Tb2Sn2O7 through ac magnetic susceptibility measurements of both the pure material and samples with small percentages of Ti substituted on the Sn sublattice. We obs
Externí odkaz:
http://arxiv.org/abs/1211.6047
Autor:
Ueland, B. G., Gardner, J. S., Williams, A. J., Dahlberg, M. L., Kim, J. G., Qiu, Y., Copley, J. R. D., Schiffer, P., Cava, R. J.
Publikováno v:
Phys. Rev. B 81, 060408R (2010)
Neutron scattering and magnetization measurements have been performed on the stuffed pyrochlore system Tb2+xTi2-2xNbxO7. We find that despite the introduction of chemical disorder and increasingly antiferromagnetic interactions, a spin glass transiti
Externí odkaz:
http://arxiv.org/abs/1001.2021
Publikováno v:
Phys. Rev. B. 78, 104411 (2008)
We report systematic low temperature measurements of the DC magnetization, AC susceptibility, and heat capacity of dysprosium pyrogermanate (Dy2Ge2O7) single crystal and powder samples. Our results confirm that Dy2Ge2O7 is an anisotropic antiferromag
Externí odkaz:
http://arxiv.org/abs/0808.3596
Autor:
Ueland, B. G., Lau, G. C., Freitas, R. S., Snyder, J., Dahlberg, M. L., Muegge, B. D., Duncan, E. L., Cava, R. J., Schiffer, P.
Publikováno v:
Phys. Rev. B 77, 144412 (2008)
We have studied the thermodynamics of the stuffed spin ice material, Dy2(DyxTi2-x)O7-x/2, in which additional Dy3+ replace Ti4+ in the pyrochlore Dy2Ti2O7. Heat capacity measurements indicate that these materials lose the spin ice zero point entropy
Externí odkaz:
http://arxiv.org/abs/0803.1163
Autor:
Morosan, E., Fleitman, J. A., Huang, Q., Lynn, J. W., Chen, Y., Ke, X., Dahlberg, M. L., Schiffer, P., Craley, C. R., Cava, R. J.
Publikováno v:
Phys. Rev. B 77 (2008) 224423
We report the anisotropic magnetic properties of Ho2Ge2O7 determined from dc and ac magnetization, specific heat and powder neutron diffraction experiments. The magnetic lanthanide sublattice, seen in our refinement of the tetragonal pyrogermanate cr
Externí odkaz:
http://arxiv.org/abs/0802.0424
Publikováno v:
Phys. Rev. B 76, 214413 (2007)
We report the magnetic and thermal properties of Dy2Sn2-xSbxO7+x/2, x = 0, 0.25, and 0.5, and Dy2NbScO7. We find evidence for Ising-like single ion ground states in the Dy2Sn2-xSbxO7+x/2 materials. These materials possess nearly the same zero point e
Externí odkaz:
http://arxiv.org/abs/0707.4009
Autor:
Ke, X., Freitas, R. S., Ueland, B. G., Lau, G. C., Dahlberg, M. L., Cava, R. J., Moessner, R., Schiffer, P.
Publikováno v:
Phys. Rev. Lett. 99, 137203 (2007)
Water ice and spin ice are important model systems in which theory can directly account for zero point entropy associated with quenched configurational disorder. Spin ice differs from water ice in the important respect that its fundamental constituen
Externí odkaz:
http://arxiv.org/abs/0707.3629
Autor:
Lau, G. C., Ueland, B. G., Dahlberg, M. L., Freitas, R. S., Huang, Q., Zandbergen, H. W., Schiffer, P., Cava, R. J.
We report a structural and thermodynamic study of the "stuffed spin ice" material Ho2TiO5 (i.e., Ho2(Ti1.33Ho0.67)O6.67), comparing samples synthesized through two different routes. Neutron powder diffraction and electron diffraction reveal that the
Externí odkaz:
http://arxiv.org/abs/0705.1703
Publikováno v:
Phys. Rev. B 73, 012413 (2006)
We report the magnetic properties of the ZnLn2S4 (Ln = Er, Tm, Yb) olivines, in which the magnetic lanthanide ions are in a potentially frustrated geometry consisting of sawtooth chains of corner-sharing triangles. Fits to the high temperature magnet
Externí odkaz:
http://arxiv.org/abs/cond-mat/0508190