High-field study of UCo2Si2: magnetostriction at metamagnetic transition and influence of Fe substitution

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F18%3A00490188" target="_blank" >RIV/68378271:_____/18:00490188 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.physb.2017.06.025" target="_blank" >http://dx.doi.org/10.1016/j.physb.2017.06.025</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.physb.2017.06.025" target="_blank" >10.1016/j.physb.2017.06.025</a>

Result language
angličtina
Original language name
High-field study of UCo2Si2: magnetostriction at metamagnetic transition and influence of Fe substitution
Original language description
UCo2Si2 (tetragonal crystal structure) is antiferromagnet below T-N = 83 K with ferromagnetic basal-plane layers of U magnetic moments oriented parallel to the c axis. The layers are coupled in +-+- sequence along this axis. In fields of 45 T applied along the c axis, UCo2Si2 exhibits very sharp metamagnetic transition to ++- uncompensated antiferromagnetic state. The transition is accompanied by pronounced magnetostriction effects. The crystal expands along the c axis by 1 * 10(-4) and shrinks in the basal plane by 0.5 * 10(-4) (at 1.5 K) resulting in negligible volume effect. Between 20 K and 40 K the transition changes from the first-to the second-order type. The Fe doping in UCo2Si2 reduces T-N from 83 K to 80 K at x = 0.2 in U(Co1-xFex)(2)Si-2. Metamagnetic transition shifts to higher fields (from 45 T at x = 0-56 T for x = 0.2). Magnetization jump over the transition remains practically the same which is in agreement with uranium magnetic moment determined by neutron diffraction on crystal with x = 0.1 as 1.29 mu(B), i.e. only slightly lower than that in UCo2Si2.
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
<a href="/en/project/GA16-03593S" target="_blank" >GA16-03593S: Magnetism of f-electron intermetallics</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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