Cross-tunneling and phonon bottleneck effects in the relaxation phenomena of XY pyrochlore antiferromagnet Er2Ti2O7
Result description
A multiple time scale relaxation dynamic is revealed by alternating current (ac) susceptibility studies of a single crystal of Er2Ti2O7 performed at high temperatures (k(B)T >> J/k(B)) in a wide range of static magnetic fields. An analysis of the frequency dependence of the ac susceptibility revealed the existence of two relaxationmechanisms, identified as an Orbach process with the pronounced effect of a phonon bottleneck and cross-tunneling. The origin of the phonon bottleneck is attributed to resonant phonon trapping. The relevance of the obtained results for relaxation phenomena found in other rare-earth pyrochlores, studied under similar conditions, is discussed.
Keywords
statesystemsdiffusionicedynamicscrystal-structurespin-lattice-relaxation
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Cross-tunneling and phonon bottleneck effects in the relaxation phenomena of XY pyrochlore antiferromagnet Er2Ti2O7
Original language description
A multiple time scale relaxation dynamic is revealed by alternating current (ac) susceptibility studies of a single crystal of Er2Ti2O7 performed at high temperatures (k(B)T >> J/k(B)) in a wide range of static magnetic fields. An analysis of the frequency dependence of the ac susceptibility revealed the existence of two relaxationmechanisms, identified as an Orbach process with the pronounced effect of a phonon bottleneck and cross-tunneling. The origin of the phonon bottleneck is attributed to resonant phonon trapping. The relevance of the obtained results for relaxation phenomena found in other rare-earth pyrochlores, studied under similar conditions, is discussed.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PHYSICAL REVIEW B
ISSN
2469-9950
e-ISSN
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Volume of the periodical
93
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
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UT code for WoS article
000368294500006
EID of the result in the Scopus database
2-s2.0-84955263013
Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
BM - Solid-state physics and magnetism
Year of implementation
2016