09915nas a2200181 4500008004100000245006500041210006300106490000700169520935100176100001909527700002009546700001909566700002109585700001909606700002109625700002009646856006709666 1991 eng d00aSite-selective oxygen-isotope substitution in YBa2Cu3O7−δ0 aSiteselective oxygenisotope substitution in YBa2Cu3O7−δ0 v443 a

We report selective substitution of oxygen-18 and oxygen-16 isotopes into the inequivalent oxygen lattice sites in YBa2Cu3O7δ. The technique involves gas-phase diffusion and exploits the site dependence of diffusion rates. The CuO2-plane [O(2),O(3)] sites of YBa2Cu3O7δ can be filled with 18O while the apical [O(4)] and CuO-chain sites [O(1)] contain 16O (the opposite distribution can also be made). The site-selective isotope occupation has been confirmed by Raman spectroscopy. Our method will permit experiments to determine the contributions of the different oxygen sites to the isotope effect, in order to locate the pairing interaction within the unit cell.

1 aMorris, D., E.1 aMarkelz, A., G.1 aWei, J., Y. T.1 aHuitgren, C., T.1 aNickel, J., H.1 aHamilton, J., C.1 aMcCarty, K., F. uhttps://journals.aps.org/prb/abstract/10.1103/PhysRevB.44.955600539nas a2200169 4500008004100000245008000041210006900121300001200190490000800202100001900210700001900229700001800248700001600266700001600282700002200298856004900320 1990 eng d00aConversion of 124 and 123 + cupric oxide: microstructure and phase diagram0 aConversion of 124 and 123 cupric oxide microstructure and phase  a245-2480 v1691 aMorris, D., E.1 aNickel, J., H.1 aMarkelz, A.G.1 aGronksy, R.1 aFendorf, M.1 aBurmester, C., P. uhttps://markelz.physics.buffalo.edu/node/32100538nas a2200169 4500008004100000020001400041245009400055210006900149260001000218300001200228490000800240100001900248700002000267700001300287700001900300856004900319 1990 eng d a0921-453400aCONVERSION OF 124 INTO 123+CUO AND 124, 123 AND 247 PHASE REGIONS IN THE Y-BA-CU-O SYSTEM0 aCONVERSION OF 124 INTO 123CUO AND 124 123 AND 247 PHASE REGIONS  cJun 1 a153-1600 v1681 aMorris, D., E.1 aMarkelz, A., G.1 aFayn, B.1 aNickel, J., H. uhttps://markelz.physics.buffalo.edu/node/28000761nas a2200265 4500008004100000020001400041245006800055210006500123260001000188300001400198490000700212100001900219700001900238700001900257700001800276700001800294700002000312700002100332700002000353700001700373700001900390700001900409700001800428856004900446 1989 eng d a0163-182900a8 NEW HIGH-TEMPERATURE SUPERCONDUCTORS WITH THE 1-2-4 STRUCTURE0 a8 NEW HIGHTEMPERATURE SUPERCONDUCTORS WITH THE 124 STRUCTURE cApr 1 a7347-73500 v391 aMorris, D., E.1 aNickel, J., H.1 aWei, J., Y. T.1 aAsmar, N., G.1 aScott, J., S.1 aScheven, U., M.1 aHultgren, C., T.1 aMarkelz, A., G.1 aPost, J., E.1 aHeaney, P., J.1 aVeblen, D., R.1 aHazen, R., M. uhttps://markelz.physics.buffalo.edu/node/28100588nas a2200193 4500008004100000020001400041245007400055210006900129260001000198300001400208490000700222100001900229700002100248700002000269700001900289700001800308700001900326856004900345 1989 eng d a0163-182900aOXYGEN CONCENTRATION EFFECT ON TC OF THE BI-CA-SR-CU-O SUPERCONDUCTOR0 aOXYGEN CONCENTRATION EFFECT ON TC OF THE BICASRCUO SUPERCONDUCTO cApr 1 a6612-66140 v391 aMorris, D., E.1 aHultgren, C., T.1 aMarkelz, A., M.1 aWei, J., Y. T.1 aAsmar, N., G.1 aNickel, J., H. uhttps://markelz.physics.buffalo.edu/node/27800501nas a2200181 4500008004100000020001400041245004400055210004400099260001000143300001400153490000700167100001900174700001900193700002000212700001900232700001900251856004900270 1988 eng d a0163-182900aSMALL OXYGEN ISOTOPE SHIFT IN YBA2CU3O70 aSMALL OXYGEN ISOTOPE SHIFT IN YBA2CU3O7 cApr 1 a5936-59390 v371 aMorris, D., E.1 aKuroda, R., M.1 aMarkelz, A., G.1 aNickel, J., H.1 aWei, J., Y. T. uhttps://markelz.physics.buffalo.edu/node/27900725nas a2200217 4500008004100000020001400041245015500055210006900210260001000279300001600289490000700305100001900312700001200331700001700343700002100360700001900381700002000400700001900420700001900439856004900458 1988 eng d a0163-182900aSPECIFIC-HEAT MEASUREMENTS ON SUPERCONDUCTING BI-CA-SR-CU AND TL-CA-BA-CU OXIDES - ABSENCE OF A LINEAR TERM IN THE SPECIFIC-HEAT OF BI-CA-SR-CU OXIDES0 aSPECIFICHEAT MEASUREMENTS ON SUPERCONDUCTING BICASRCU AND TLCABA cDec 1 a11942-119450 v381 aFisher, R., A.1 aKim, S.1 aLacy, S., E.1 aPhillips, N., E.1 aMorris, D., E.1 aMarkelz, A., G.1 aWei, J., Y. T.1 aGinley, D., S. uhttps://markelz.physics.buffalo.edu/node/277