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@ARTICLE{Chang:15570,
author = {Chang, L. J. and Schweika, W. and Kao, Y.-J. and Chou, Y.
Z. and Perßon, J. and Brückel, T. and Yang, H. C. and
Chen, Y. Y. and Gardner, J. S.},
title = {{M}agnetic correlations in {H}ox{T}b2-x{T}i2{O}7},
journal = {Physical review / B},
volume = {83},
number = {14},
issn = {1098-0121},
address = {College Park, Md.},
publisher = {APS},
reportid = {PreJuSER-15570},
pages = {144413},
year = {2011},
note = {This work was supported in Taiwan by Grants No. NSC
96-2739-M-213-001, No. NSC 99-2112-M-007-020 (LJC), No. NSC
97-2628-M-002-011-MY3, and No. NTU 98R0066-65, -68 (Y.Z.C.
and Y.J.K.).},
abstract = {Polycrystalline samples of HoxTb2-xTi2O7 (0 < x < 2) have
been prepared and characterized for their structural and
magnetic properties. The parent compounds of this solid
solution are the spin ice Ho2Ti2O7 and the spin liquid
Tb2Ti2O7. Specific-heat measurements on HoTbTi2O7 (x = 1.0)
reveal the absence of a long-range order state above 0.5 K.
The integrated entropies of all HoxTb2-xTi2O7 specimens up
to 30 K scale well with the ratio of spin ice and spin
liquid in the composition. The neutron diffraction spectrum
of HoTbTi2O7 exhibits a dipolar spin-ice pattern and can be
well described by mean-field theory for < 111 > Ising spins,
nearest-neighbor exchange, and dipolar interactions.
Inelastic neutron scattering on HoTbTi2O7 reveals two
dispersionless excitations, one of similar to 2.5 meV out of
the ground state, and a 4-meV transition out of an excited
state. We argue that these data suggest that the very strong
single-ion effects of Ho2Ti2O7 and Tb2Ti2O7 persist in the
HoxTb2-xTi2O7(0 < x < 2) solid solution, whereas the Tb-Ho
correlations are weak, resulting in small shifts in the
energy scales but with no dramatic effect on the bulk
properties.},
keywords = {J (WoSType)},
cin = {PGI-4 / JCNS-2 / JARA-FIT},
ddc = {530},
cid = {I:(DE-Juel1)PGI-4-20110106 / I:(DE-Juel1)JCNS-2-20110106 /
$I:(DE-82)080009_20140620$},
pnm = {Grundlagen für zukünftige Informationstechnologien /
Großgeräte für die Forschung mit Photonen, Neutronen und
Ionen (PNI)},
pid = {G:(DE-Juel1)FUEK412 / G:(DE-Juel1)FUEK415},
experiment = {EXP:(DE-MLZ)DNS-20140101},
shelfmark = {Physics, Condensed Matter},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000291973500004},
doi = {10.1103/PhysRevB.83.144413},
url = {https://juser.fz-juelich.de/record/15570},
}