Planar Josephson junctions fabricated with magnesium diboride films. Kahler, D., Talvacchio, J, Murduck, J., Kirschenbaum, A, Brooks, R., Bu, S., Choi, J, Kim, D., & Eom, C. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 13(2, 1):1063-1066, JUN, 2003. Applied Superconductivity Conference, HOUSTON, TX, AUG 04-09, 2002doi abstract bibtex Josephson junctions were fabricated in three planar configurations using a focused ion beam (FIB) to cut greater than or equal to70 mn gaps in MgB2 bridges. In two of the approaches-narrowed microbridges where a 0.1 mum bridge was left in place after the FIB cut or thinned microbridges where a 20-40 nm-thick film layer remained uncut-we reproduced junction results obtained by other researchers but with I-c(T) > 0 at substantially higher temperatures, >32 K. Measurements were made of critical current modulation in an applied magnetic field and I-V curves were measured with the chips exposed to 1-10 GHz radiation. In the third configuration, S-N-S structures were made by filling the gap made by the FIB with, a noble metal. This configuration is preferred to S-S'-S since the, normal-couductor coherence length of 40-100 nm for a clean metal roughly matches the width of the FIB cut. Junction R-n measurements showed that ex-situ An deposited after a low-energy argon ion cleaning was not as effective as in-situ Pt deposition for obtaining low-resistance S-N interfaces.
@article{ ISI:000184241700246,
Author = {Kahler, DA and Talvacchio, J and Murduck, JM and Kirschenbaum, A and
Brooks, RE and Bu, SB and Choi, J and Kim, DM and Eom, CB},
Title = {{Planar Josephson junctions fabricated with magnesium diboride films}},
Journal = {{IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY}},
Year = {{2003}},
Volume = {{13}},
Number = {{2, 1}},
Pages = {{1063-1066}},
Month = {{JUN}},
Note = {{Applied Superconductivity Conference, HOUSTON, TX, AUG 04-09, 2002}},
Organization = {{Apple; Argonne Natl Lab; Florida State Univ, Ctr Adv Power Syst;
Cingular Wireless; Council SuperConductiv Amer Competit; Hewlett Packard
Co; Houston Adv Res Ctr; IEEE CSC Council Superconductiv; IISSC;
Marimon; Naval Res Lab; Oak Ridge Natl Lab; Univ Houston, Texas Ctr
Superconductiv \& Adv Mat; US DOE, Div High Energy Phys; Univ Houston,
Cullen Coll Engn; Univ Houston, Coll Nat Sci \& Math; Univ Houston, Div
Res; Wah Chang}},
Abstract = {{Josephson junctions were fabricated in three planar configurations using
a focused ion beam (FIB) to cut greater than or equal to70 mn gaps in
MgB2 bridges. In two of the approaches-narrowed microbridges where a 0.1
mum bridge was left in place after the FIB cut or thinned microbridges
where a 20-40 nm-thick film layer remained uncut-we reproduced junction
results obtained by other researchers but with I-c(T) > 0 at
substantially higher temperatures, >32 K. Measurements were made of
critical current modulation in an applied magnetic field and I-V curves
were measured with the chips exposed to 1-10 GHz radiation. In the third
configuration, S-N-S structures were made by filling the gap made by the
FIB with, a noble metal. This configuration is preferred to S-S'-S since
the, normal-couductor coherence length of 40-100 nm for a clean metal
roughly matches the width of the FIB cut. Junction R-n measurements
showed that ex-situ An deposited after a low-energy argon ion cleaning
was not as effective as in-situ Pt deposition for obtaining
low-resistance S-N interfaces.}},
DOI = {{10.1109/TASC.2003.814152}},
ISSN = {{1051-8223}},
EISSN = {{1558-2515}},
ResearcherID-Numbers = {{Eom, Chang-Beom/I-5567-2014}},
Unique-ID = {{ISI:000184241700246}},
}
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In two of the approaches-narrowed microbridges where a 0.1 mum bridge was left in place after the FIB cut or thinned microbridges where a 20-40 nm-thick film layer remained uncut-we reproduced junction results obtained by other researchers but with I-c(T) > 0 at substantially higher temperatures, >32 K. Measurements were made of critical current modulation in an applied magnetic field and I-V curves were measured with the chips exposed to 1-10 GHz radiation. In the third configuration, S-N-S structures were made by filling the gap made by the FIB with, a noble metal. This configuration is preferred to S-S'-S since the, normal-couductor coherence length of 40-100 nm for a clean metal roughly matches the width of the FIB cut. Junction R-n measurements showed that ex-situ An deposited after a low-energy argon ion cleaning was not as effective as in-situ Pt deposition for obtaining low-resistance S-N interfaces.","doi":"10.1109/TASC.2003.814152","issn":"1051-8223","eissn":"1558-2515","researcherid-numbers":"Eom, Chang-Beom/I-5567-2014","unique-id":"ISI:000184241700246","bibtex":"@article{ ISI:000184241700246,\nAuthor = {Kahler, DA and Talvacchio, J and Murduck, JM and Kirschenbaum, A and\n Brooks, RE and Bu, SB and Choi, J and Kim, DM and Eom, CB},\nTitle = {{Planar Josephson junctions fabricated with magnesium diboride films}},\nJournal = {{IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY}},\nYear = {{2003}},\nVolume = {{13}},\nNumber = {{2, 1}},\nPages = {{1063-1066}},\nMonth = {{JUN}},\nNote = {{Applied Superconductivity Conference, HOUSTON, TX, AUG 04-09, 2002}},\nOrganization = {{Apple; Argonne Natl Lab; Florida State Univ, Ctr Adv Power Syst;\n Cingular Wireless; Council SuperConductiv Amer Competit; Hewlett Packard\n Co; Houston Adv Res Ctr; IEEE CSC Council Superconductiv; IISSC;\n Marimon; Naval Res Lab; Oak Ridge Natl Lab; Univ Houston, Texas Ctr\n Superconductiv \\& Adv Mat; US DOE, Div High Energy Phys; Univ Houston,\n Cullen Coll Engn; Univ Houston, Coll Nat Sci \\& Math; Univ Houston, Div\n Res; Wah Chang}},\nAbstract = {{Josephson junctions were fabricated in three planar configurations using\n a focused ion beam (FIB) to cut greater than or equal to70 mn gaps in\n MgB2 bridges. In two of the approaches-narrowed microbridges where a 0.1\n mum bridge was left in place after the FIB cut or thinned microbridges\n where a 20-40 nm-thick film layer remained uncut-we reproduced junction\n results obtained by other researchers but with I-c(T) > 0 at\n substantially higher temperatures, >32 K. Measurements were made of\n critical current modulation in an applied magnetic field and I-V curves\n were measured with the chips exposed to 1-10 GHz radiation. In the third\n configuration, S-N-S structures were made by filling the gap made by the\n FIB with, a noble metal. This configuration is preferred to S-S'-S since\n the, normal-couductor coherence length of 40-100 nm for a clean metal\n roughly matches the width of the FIB cut. Junction R-n measurements\n showed that ex-situ An deposited after a low-energy argon ion cleaning\n was not as effective as in-situ Pt deposition for obtaining\n low-resistance S-N interfaces.}},\nDOI = {{10.1109/TASC.2003.814152}},\nISSN = {{1051-8223}},\nEISSN = {{1558-2515}},\nResearcherID-Numbers = {{Eom, Chang-Beom/I-5567-2014}},\nUnique-ID = {{ISI:000184241700246}},\n}\n\n","author_short":["Kahler, D.","Talvacchio, J","Murduck, J.","Kirschenbaum, A","Brooks, R.","Bu, S.","Choi, J","Kim, D.","Eom, C."],"key":"ISI:000184241700246","id":"ISI:000184241700246","bibbaseid":"kahler-talvacchio-murduck-kirschenbaum-brooks-bu-choi-kim-etal-planarjosephsonjunctionsfabricatedwithmagnesiumdiboridefilms-2003","role":"author","urls":{},"downloads":0,"html":""},"search_terms":["planar","josephson","junctions","fabricated","magnesium","diboride","films","kahler","talvacchio","murduck","kirschenbaum","brooks","bu","choi","kim","eom"],"keywords":[],"authorIDs":["5ba03c0cebfd3910000001e0"],"dataSources":["zArY7xMz8KdDswhhx"]}