Modulated‐bath calorimetry
A new high‐resolution ac calorimetric technique is described for measuring the absolute heat capacity of extremely small samples. The method uses a thermocouple as the weak link to the bath and modulates the temperature of the bath sinusoidally in time. This eliminates the need for a separate thermo...
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| Veröffentlicht in: | Rev. Sci. Instrum.; (United States) 1989-06, Vol.60 (6), p.1123-1128 |
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| container_issue | 6 |
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| container_title | Rev. Sci. Instrum.; (United States) |
| container_volume | 60 |
| creator | Graebner, J. E. |
| description | A new high‐resolution ac calorimetric technique is described for measuring the absolute heat capacity of extremely small samples. The method uses a thermocouple as the weak link to the bath and modulates the temperature of the bath sinusoidally in time. This eliminates the need for a separate thermometer and heater on the sample while retaining the ability to make absolute measurements with minimal addenda. Results for a 2.9 μg sample of the superconductor Ba0.6K0.4BiO3 in a magnetic field of 60 kOe show a jump at T
c
=21 K, which is above the noise level of ∼2 parts in 104. |
| doi_str_mv | 10.1063/1.1141068 |
| format | Article |
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=21 K, which is above the noise level of ∼2 parts in 104.</description><subject>360204 - Ceramics, Cermets, & Refractories- Physical Properties</subject><subject>440300 - Miscellaneous Instruments- (-1989)</subject><subject>656100 - Condensed Matter Physics- Superconductivity</subject><subject>ALKALI METAL COMPOUNDS</subject><subject>ALKALINE EARTH METAL COMPOUNDS</subject><subject>BARIUM COMPOUNDS</subject><subject>BARIUM OXIDES</subject><subject>BISMUTH COMPOUNDS</subject><subject>BISMUTH OXIDES</subject><subject>CALORIMETERS</subject><subject>CHALCOGENIDES</subject><subject>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</subject><subject>ELECTRIC CONDUCTIVITY</subject><subject>ELECTRICAL PROPERTIES</subject><subject>Exact sciences and technology</subject><subject>Instruments, apparatus, components and techniques common to several branches of physics and astronomy</subject><subject>MATERIALS SCIENCE</subject><subject>MEASURING INSTRUMENTS</subject><subject>OTHER INSTRUMENTATION</subject><subject>OXIDES</subject><subject>OXYGEN COMPOUNDS</subject><subject>PHYSICAL PROPERTIES</subject><subject>Physics</subject><subject>POTASSIUM COMPOUNDS</subject><subject>POTASSIUM OXIDES</subject><subject>RESOLUTION</subject><subject>SPECIFIC HEAT</subject><subject>SUPERCONDUCTIVITY</subject><subject>Thermal instruments, apparatus and techniques</subject><subject>THERMOCOUPLES</subject><subject>THERMODYNAMIC PROPERTIES</subject><subject>THERMOMETERS</subject><issn>0034-6748</issn><issn>1089-7623</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1989</creationdate><recordtype>article</recordtype><recordid>eNp9j7tKBDEUhoMoOK4W9hYiNgqz5kwuk5SyeIMVG61DJsmwI-NkSaKwnY_gM_okZpllLQRPc07xnf-C0DHgKWBOrmAKQPMldlABWMiy5hXZRQXGhJa8pmIfHcT4ivMwgAKdPHr73uvk7PfnV6PT4tTo3ofuzaWwOkR7re6jO9rsCXq5vXme3Zfzp7uH2fW8NBRkKq0lhrGmwgRXTnBjXaOJxSxbtE5LLjHUDigRDafUsNpQltPoFpgVmHJCJuhs1PUxdSqaLjmzMH4YnEmKg6g4YRm6GCETfIzBtWqZY-qwUoDVursCteme2fORXeqY-7RBD6aL2wfOiZQSZ-xyxNaWOnV-2CIfPvzqqaVt_4P_BvgBmZxyew</recordid><startdate>19890601</startdate><enddate>19890601</enddate><creator>Graebner, J. 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E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c419t-dd3c55b20302e86cdeba3d05005fea969017e1438b644c57c45034af15d804633</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1989</creationdate><topic>360204 - Ceramics, Cermets, & Refractories- Physical Properties</topic><topic>440300 - Miscellaneous Instruments- (-1989)</topic><topic>656100 - Condensed Matter Physics- Superconductivity</topic><topic>ALKALI METAL COMPOUNDS</topic><topic>ALKALINE EARTH METAL COMPOUNDS</topic><topic>BARIUM COMPOUNDS</topic><topic>BARIUM OXIDES</topic><topic>BISMUTH COMPOUNDS</topic><topic>BISMUTH OXIDES</topic><topic>CALORIMETERS</topic><topic>CHALCOGENIDES</topic><topic>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</topic><topic>ELECTRIC CONDUCTIVITY</topic><topic>ELECTRICAL PROPERTIES</topic><topic>Exact sciences and technology</topic><topic>Instruments, apparatus, components and techniques common to several branches of physics and astronomy</topic><topic>MATERIALS SCIENCE</topic><topic>MEASURING INSTRUMENTS</topic><topic>OTHER INSTRUMENTATION</topic><topic>OXIDES</topic><topic>OXYGEN COMPOUNDS</topic><topic>PHYSICAL PROPERTIES</topic><topic>Physics</topic><topic>POTASSIUM COMPOUNDS</topic><topic>POTASSIUM OXIDES</topic><topic>RESOLUTION</topic><topic>SPECIFIC HEAT</topic><topic>SUPERCONDUCTIVITY</topic><topic>Thermal instruments, apparatus and techniques</topic><topic>THERMOCOUPLES</topic><topic>THERMODYNAMIC PROPERTIES</topic><topic>THERMOMETERS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Graebner, J. E.</creatorcontrib><creatorcontrib>ATandT Bell Laboratories, Murray Hill, New Jersey 07974</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Rev. Sci. Instrum.; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Graebner, J. E.</au><aucorp>ATandT Bell Laboratories, Murray Hill, New Jersey 07974</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Modulated‐bath calorimetry</atitle><jtitle>Rev. Sci. Instrum.; (United States)</jtitle><date>1989-06-01</date><risdate>1989</risdate><volume>60</volume><issue>6</issue><spage>1123</spage><epage>1128</epage><pages>1123-1128</pages><issn>0034-6748</issn><eissn>1089-7623</eissn><coden>RSINAK</coden><abstract>A new high‐resolution ac calorimetric technique is described for measuring the absolute heat capacity of extremely small samples. The method uses a thermocouple as the weak link to the bath and modulates the temperature of the bath sinusoidally in time. This eliminates the need for a separate thermometer and heater on the sample while retaining the ability to make absolute measurements with minimal addenda. Results for a 2.9 μg sample of the superconductor Ba0.6K0.4BiO3 in a magnetic field of 60 kOe show a jump at T
c
=21 K, which is above the noise level of ∼2 parts in 104.</abstract><cop>Woodbury, NY</cop><pub>American Institute of Physics</pub><doi>10.1063/1.1141068</doi><tpages>6</tpages></addata></record> |
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| identifier | ISSN: 0034-6748 |
| ispartof | Rev. Sci. Instrum.; (United States), 1989-06, Vol.60 (6), p.1123-1128 |
| issn | 0034-6748 1089-7623 |
| language | eng |
| recordid | cdi_crossref_primary_10_1063_1_1141068 |
| source | AIP Digital Archive |
| subjects | 360204 - Ceramics, Cermets, & Refractories- Physical Properties 440300 - Miscellaneous Instruments- (-1989) 656100 - Condensed Matter Physics- Superconductivity ALKALI METAL COMPOUNDS ALKALINE EARTH METAL COMPOUNDS BARIUM COMPOUNDS BARIUM OXIDES BISMUTH COMPOUNDS BISMUTH OXIDES CALORIMETERS CHALCOGENIDES CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ELECTRIC CONDUCTIVITY ELECTRICAL PROPERTIES Exact sciences and technology Instruments, apparatus, components and techniques common to several branches of physics and astronomy MATERIALS SCIENCE MEASURING INSTRUMENTS OTHER INSTRUMENTATION OXIDES OXYGEN COMPOUNDS PHYSICAL PROPERTIES Physics POTASSIUM COMPOUNDS POTASSIUM OXIDES RESOLUTION SPECIFIC HEAT SUPERCONDUCTIVITY Thermal instruments, apparatus and techniques THERMOCOUPLES THERMODYNAMIC PROPERTIES THERMOMETERS |
| title | Modulated‐bath calorimetry |
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