Probing Ice-Rule-Breaking Transition in Dy2Ti2O7 Thin Film by Proximitized Transport and Magnetic Torque

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10506343" target="_blank" >RIV/00216208:11320/25:10506343 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=oYxLu.2ysK" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=oYxLu.2ysK</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/w6cq-2qwl" target="_blank" >10.1103/w6cq-2qwl</a>

Result language
angličtina
Original language name
Probing Ice-Rule-Breaking Transition in Dy2Ti2O7 Thin Film by Proximitized Transport and Magnetic Torque
Original language description
While the spin-ice state of bulk pyrochlores such as Dy<inf>2</inf>Ti<inf>2</inf>O<inf>7</inf> and Ho<inf>2</inf>Ti<inf>2</inf>O<inf>7</inf> has been extensively studied in the past several decades due to its unique degenerate ground state and emergent monopole excitation, whether it survives in the thin-film form remains a mystery. The limited volume of the thin-film sample makes it challenging to study the intrinsic magnetic properties. Here, we synthesized 18-nm-thick Dy<inf>2</inf>Ti<inf>2</inf>O<inf>7</inf> thin film on yttria-stabilized zirconia with 9.5 mol% Y<inf>2</inf>O<inf>3</inf> substrate and capped it by a thin conductive Bi<inf>2</inf>Ir<inf>2</inf>O<inf>7</inf> layer and performed the proximitized magnetoresistance measurements. Our Letter found that the ice-rule-breaking phase transition survives but with a modified effective nearest-neighbor interaction (J<inf>eff</inf>=1.054 K) and distorted Ising spin axes (ϵ=+0.051) compared to the bulk crystal. The results are supported by the simultaneously measured capacitive torque magnetometry. Our Letter demonstrates that proximitized transport is an effective tool for thin films of insulating frustrated magnets.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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