Low-temperature phase transitions in {kappa}-(ET){sub 2}Cu[N(CN){sub 2}]Br: Evidence from specific heat and electrical resistivity

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Phase transition anomalies occurring at temperatures T{sub 1}=20.9 K and T{sub 2}=100.5 K in crystalline K-(ET){sub 2}Cu[N(CN){sub 2}]Br have been identified with ac calorimetry. T{sub 2} is unaffected by small stresses applied with vacuum grease, whereas the superconducting transition at T{sub c}=11.2 K is reduced to 10.5 K and T{sub 1} is slightly depressed to 20.7 K by these stresses. Electrical resistivity data exhibit normal state anomalies at 200 {plus_minus} 10 K, 99.9 K, 79.1 K and 19 {plus_minus} 1 K. These results are compared top previous DC magnetization and vibrating read measurements that suggest the existence of a field-induced ... continued below

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7 p.

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Kuo, Y.K.; Brill, J.W.; De Long, L.E. & Brock, C.P. December 31, 1995.

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Phase transition anomalies occurring at temperatures T{sub 1}=20.9 K and T{sub 2}=100.5 K in crystalline K-(ET){sub 2}Cu[N(CN){sub 2}]Br have been identified with ac calorimetry. T{sub 2} is unaffected by small stresses applied with vacuum grease, whereas the superconducting transition at T{sub c}=11.2 K is reduced to 10.5 K and T{sub 1} is slightly depressed to 20.7 K by these stresses. Electrical resistivity data exhibit normal state anomalies at 200 {plus_minus} 10 K, 99.9 K, 79.1 K and 19 {plus_minus} 1 K. These results are compared top previous DC magnetization and vibrating read measurements that suggest the existence of a field-induced magnetic transition and a high sensitivity of superconducting properties to small stresses and thermal cycling.

Physical Description

7 p.

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OSTI as DE96005538

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  • 2. physical phenomena at high magnetic fields conference, Tallahassee, FL (United States), 6-9 May 1995

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  • Other: DE96005538
  • Report No.: ANL/CHM/CP--87449
  • Report No.: CONF-9505186--7
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 196556
  • Archival Resource Key: ark:/67531/metadc668321

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  • December 31, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Aug. 23, 2016, 3:09 p.m.

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Kuo, Y.K.; Brill, J.W.; De Long, L.E. & Brock, C.P. Low-temperature phase transitions in {kappa}-(ET){sub 2}Cu[N(CN){sub 2}]Br: Evidence from specific heat and electrical resistivity, article, December 31, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc668321/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.