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High-frequency electron-spin-resonance measurements on Mn x Mg1-xO (x = 1.0×10-4) and DPPH at very low temperatures

Y Fujii; T Asano; S Vasiliev; S Miura; A Fukuda; Y Ishikawa; H Kikuchi; H Yamamori; T Mizusaki; S Lee; K Ohya; S Mitsudo; A Matsubara

dc.contributor.authorY Fujii
dc.contributor.authorT Asano
dc.contributor.authorS Vasiliev
dc.contributor.authorS Miura
dc.contributor.authorA Fukuda
dc.contributor.authorY Ishikawa
dc.contributor.authorH Kikuchi
dc.contributor.authorH Yamamori
dc.contributor.authorT Mizusaki
dc.contributor.authorS Lee
dc.contributor.authorK Ohya
dc.contributor.authorS Mitsudo
dc.contributor.authorA Matsubara
dc.date.accessioned2022-10-27T11:45:25Z
dc.date.available2022-10-27T11:45:25Z
dc.identifier.issn1742-6588
dc.identifier.urihttps://www.utupub.fi/handle/10024/155015
dc.description.abstract<p>We have developed a millimeter-wave electron-spin-resonance (ESR) system for very low temperatures (<i>T</i> < 1 K) that can be employed for nuclear-magnetic-resonance measurements by using dynamic nuclear polarization. The system uses a Fabry-Pérot resonator that works in the frequency range of 125 – 130 GHz and covers the temperature range of 0.09 – 6.5 K. We have performed ESR measurements in the frequency around 128 GHz by using Mn<i> <sub>x</sub> </i>Mg<sub>1-<i>x</i> </sub>O (<i>x</i> = 1.0 <b>×</b> 10<sup>-4</sup>) and free-radical samples of 1, 1-diphenyl-2-picrylhydrazyl (DPPH), because these samples have been proposed as field and sensitivity markers. Temperature dependence of the ESR signal intensity for Mn<i> <sub>x</sub> </i>Mg<sub>1-<i>x</i> </sub>O shows anomalies originating from magnetic order are found around 3.5 – 4 K. We estimate the sensitivity of the system for ESR detections to be 6 <b>×</b> 10<sup>13</sup> spins/G at 5.8 K. Because DPPH shows no observable shift in the magnetic field, we propose it as a useful standard marker for ESR measurements at very low temperatures.</p>
dc.language.isoen
dc.titleHigh-frequency electron-spin-resonance measurements on Mn x Mg1-xO (x = 1.0×10-4) and DPPH at very low temperatures
dc.identifier.urnURN:NBN:fi-fe2021042719356
dc.relation.volume1
dc.relation.volume969
dc.contributor.organizationfi=Wihurin fysiikantutkimuslaboratorio|en=Wihuri Physical Laboratory|
dc.contributor.organization-code2606701
dc.converis.publication-id32080607
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/32080607
dc.identifier.jour-issn1742-6588
dc.okm.affiliatedauthorVasiliev, Sergey
dc.okm.discipline114 Physical sciencesen_GB
dc.okm.discipline114 Fysiikkafi_FI
dc.okm.internationalcopublicationinternational co-publication
dc.okm.internationalityInternational publication
dc.okm.typeConference proceedings article
dc.publisher.countryUnited Kingdomen_GB
dc.publisher.countryBritanniafi_FI
dc.publisher.country-codeGB
dc.relation.conferenceInternational Conference on Low Temperature Physics
dc.relation.doi10.1088/1742-6596/969/1/012111
dc.relation.ispartofjournalJournal of Physics: Conference Series
dc.title.book28th International Conference on Low Temperature Physics (LT28) 9–16 August 2017, Gothenburg, Sweden
dc.year.issued2018


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