Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Studies of magnetoresistance and Y substitutions in YBa2Cu3O7-delta high temperature superconductors
KTH, Superseded Departments, Physics. (Fasta tillståndets fysik)ORCID iD: 0000-0002-9858-6235
1992 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 1992. , 65 p.
Series
Trita-FYS, ISSN 0280-316X ; 5172
Keyword [en]
high-temperature superconductors, elctrical conductivity, magnetoresistance, measurement systems, YBa2Cu3O7, substitutional effects
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-51236OAI: oai:DiVA.org:kth-51236DiVA: diva2:464178
Public defence
Kollegiesalen, Valhallavägen 79, Stockholm (English)
Opponent
Supervisors
Note
QC 20111214Available from: 2011-12-14 Created: 2011-12-10 Last updated: 2011-12-14Bibliographically approved
List of papers
1. Structural and superconducting properties of samples of the compositions Sm1-y-xCayPrxBa2Cu3O7-delta and Sm1-xPrxBa2Cu3O7-delta
Open this publication in new window or tab >>Structural and superconducting properties of samples of the compositions Sm1-y-xCayPrxBa2Cu3O7-delta and Sm1-xPrxBa2Cu3O7-delta
Show others...
1991 (English)Conference paper, Published paper (Refereed)
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-51037 (URN)
Conference
MSU-HTSC-2, International Workshop in Chemistry and Technology of High-Temperature Superconductors, Moscow. Oct. 14-18 1991
Note
QC 20111213Available from: 2011-12-10 Created: 2011-12-09 Last updated: 2011-12-14Bibliographically approved
2. NEUTRON-DIFFRACTION STUDIES OF Y1-2XCAXTHXBA2CU3O7-DELTA WITH X-LESS-THAN=0.1
Open this publication in new window or tab >>NEUTRON-DIFFRACTION STUDIES OF Y1-2XCAXTHXBA2CU3O7-DELTA WITH X-LESS-THAN=0.1
1991 (English)In: Physica. C, Superconductivity, ISSN 0921-4534, E-ISSN 1873-2143, Vol. 185, 915-916 p.Article in journal (Refereed) Published
Abstract [en]

We have made Rietveld refinements on neutron powder diffraction data from Y1-2xCaxThxBa2Cu3O7-delta samples with x < = 0.1. Only small changes in lattice distances are detected. Most noticeable are a flattening of the CuO-planes and a possible small increase in the distance between Cu(1) and the edge oxygen O(4). A comparison with the Y1-xCaxBa2Cu3O7-delta system is made.

National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-50012 (URN)10.1016/0921-4534(91)91681-S (DOI)A1991GW83000092 ()
Note
3RD INTERNATIONAL CONF ON MATERIALS AND MECHANISMS OF SUPERCONDUCTIVITY : HIGH TEMPERATURE SUPERCONDUCTORS, KANAZAWA, JAPAN, JUL 22-26, 1991Available from: 2011-12-01 Created: 2011-12-01 Last updated: 2017-12-08Bibliographically approved
3. STRUCTURAL AND SUPERCONDUCTING PROPERTIES OF Y1-2XCAXPRXBA2CU3O7-GAMMA
Open this publication in new window or tab >>STRUCTURAL AND SUPERCONDUCTING PROPERTIES OF Y1-2XCAXPRXBA2CU3O7-GAMMA
Show others...
1992 (English)In: Physica. C, Superconductivity, ISSN 0921-4534, E-ISSN 1873-2143, Vol. 190, no 3, 255-260 p.Article in journal (Refereed) Published
Abstract [en]

Samples of the nominal composition Y1-2xCaxPrxBa2Cu3O7-delta with 0 less-than-or-equal-to x less-than-or-equal-to 0.4 have been studied by X-ray diffraction techniques, chemical analyses, and measurements of the super conducting transition temperature and the upper critical magnetic field. For x less-than-or-equal-to 0.25, the results indicate that Ca and Pr can both replace Y in agreement with the nominal composition, while for x > 0.25 only Pr enters the orthorhombic unit cell. Compared to Pr substitution in 1:2:3 we observe small changes in the depression of T(c) and strong changes in the critical field slopes. These results suggest that if Pr has a magnetic pair-breaking effect, it is close to being temperature independent.

Keyword
NORMAL-STATE PROPERTIES, DIFFRACTION, VALENCE, SYSTEM, FIELD
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-50010 (URN)10.1016/0921-4534(92)90603-A (DOI)A1992HC66900009 ()
Available from: 2011-12-01 Created: 2011-12-01 Last updated: 2017-12-08Bibliographically approved
4. MAGNETORESISTANCE MEASUREMENTS ON SINTERED YBA2CU3O7-DELTA
Open this publication in new window or tab >>MAGNETORESISTANCE MEASUREMENTS ON SINTERED YBA2CU3O7-DELTA
1990 (English)In: Physica. B, Condensed matter, ISSN 0921-4526, E-ISSN 1873-2135, Vol. 165, 1365-1366 p.Article in journal (Refereed) Published
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-50015 (URN)10.1016/S0921-4526(09)80268-8 (DOI)A1990ED42800263 ()
Note
19th International Conf on Low Temperature Physics, Brighton, England, Aug 16-22, 1990Available from: 2011-12-01 Created: 2011-12-01 Last updated: 2017-12-08Bibliographically approved
5. UPPER CRITICAL MAGNETIC-FIELD OF Y1-2XCAXTHXBA2CU3O7-DELTA
Open this publication in new window or tab >>UPPER CRITICAL MAGNETIC-FIELD OF Y1-2XCAXTHXBA2CU3O7-DELTA
1989 (English)In: Physica. C, Superconductivity, ISSN 0921-4534, E-ISSN 1873-2143, Vol. 162, 725-726 p.Article in journal (Refereed) Published
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-50016 (URN)10.1016/0921-4534(89)91229-X (DOI)A1989CG48900339 ()
Note
INTERNATIONAL CONF ON MATERIALS AND MECHANISMS OF SUPERCONDUCTIVITY : HIGH TEMPERATURE SUPERCONDUCTORS 2, STANFORD UNIV, CA, JUL 23-28, 1989Available from: 2011-12-01 Created: 2011-12-01 Last updated: 2017-12-08Bibliographically approved
6. MAGNETORESISTANCE MEASUREMENTS ON POLYCRYSTALLINE YBA2CU3O7-DELTA
Open this publication in new window or tab >>MAGNETORESISTANCE MEASUREMENTS ON POLYCRYSTALLINE YBA2CU3O7-DELTA
1991 (English)In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 44, no 14, 7722-7725 p.Article in journal (Refereed) Published
Abstract [en]

The magnetoresistance of a polycrystalline sample of YBa2Cu3O7-delta has been measured by an ordinary resistive method at temperatures from about 1 to 15 K above T(c) and in magnetic fields up to 12 T. From our experimental results and the theory of Hikami and Larkin, we obtain values of the coherence lengths xi-ab = 15.6 angstrom and xi-c = 3.6 angstrom and of the phase-breaking time tau-phi = 1.8 x 10(-13) s.

Keyword
THERMODYNAMIC FLUCTUATIONS, TC, SUPERCONDUCTORS, CONDUCTIVITY
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-50013 (URN)10.1103/PhysRevB.44.7722 (DOI)A1991GH80800068 ()
Available from: 2011-12-01 Created: 2011-12-01 Last updated: 2017-12-08Bibliographically approved
7. MAGNETORESISTANCE MEASUREMENTS ON (CA,TH)-DOPED YBA2CU3O7-DELTA
Open this publication in new window or tab >>MAGNETORESISTANCE MEASUREMENTS ON (CA,TH)-DOPED YBA2CU3O7-DELTA
1991 (English)In: Physica. C, Superconductivity, ISSN 0921-4534, E-ISSN 1873-2143, Vol. 185, 1901-1902 p.Article in journal (Refereed) Published
Abstract [en]

Magnetoresistance measurements on sintered Y1-2xCaxThxBa2Cu3O7-delta samples with x < = 0.1 are reported. By fitting the measured data to the Hikami-Larkin theory, we obtain coherence lengths, xi-ab and xi-c’ and a phase breaking time tau-phi All these parameters are found to decrease with (Ca,Th) doping. We also conclude that magnetoresistance measurements are highly sensitive to inhomogeneities in the sample.

National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-50011 (URN)10.1016/0921-4534(91)91076-G (DOI)A1991GX30800242 ()
Note
INTERNATIONAL CONF ON MATERIALS AND MECHANISMS OF SUPERCONDUCTIVITY HIGH TEMPERATURE SUPERCONDUCTORS 3, KANAZAWA, JAPAN, JUL 22-26, 1991Available from: 2011-12-01 Created: 2011-12-01 Last updated: 2017-12-08Bibliographically approved
8. STRUCTURAL, THERMAL AND ELECTRICAL STUDIES OF THE Y1-2XCAXTHXBA2CU3O7-DELTA SYSTEM WITH 0 LESS-THAN-OR-EQUAL-TO 0.20
Open this publication in new window or tab >>STRUCTURAL, THERMAL AND ELECTRICAL STUDIES OF THE Y1-2XCAXTHXBA2CU3O7-DELTA SYSTEM WITH 0 LESS-THAN-OR-EQUAL-TO 0.20
1989 (English)In: Physica. C, Superconductivity, ISSN 0921-4534, E-ISSN 1873-2143, Vol. 160, no 1, 65-68 p.Article in journal (Refereed) Published
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-50017 (URN)10.1016/0921-4534(89)90453-X (DOI)A1989AQ33300010 ()
Available from: 2011-12-01 Created: 2011-12-01 Last updated: 2017-12-08Bibliographically approved
9. The Oxford cryostat - a manual
Open this publication in new window or tab >>The Oxford cryostat - a manual
1991 (English)Report (Other academic)
Publisher
54 p.
Series
Trita-FYS, ISSN 0280-316X ; 5150
Keyword
cryotechnology, cryostat
National Category
Other Engineering and Technologies not elsewhere specified
Identifiers
urn:nbn:se:kth:diva-51033 (URN)
Note
QC 20111212Available from: 2011-12-10 Created: 2011-12-09 Last updated: 2011-12-14Bibliographically approved
10. NEUTRON-DIFFRACTION STUDIES OF INTERATOMIC DISTANCES IN THE Y1-2XCAXTHXBA2CU3O7-DELTA SYSTEM
Open this publication in new window or tab >>NEUTRON-DIFFRACTION STUDIES OF INTERATOMIC DISTANCES IN THE Y1-2XCAXTHXBA2CU3O7-DELTA SYSTEM
1992 (English)In: Solid State Communications, ISSN 0038-1098, E-ISSN 1879-2766, Vol. 81, no 5, 425-429 p.Article in journal (Refereed) Published
Abstract [en]

Neutron diffraction studies have been performed for three samples of Y(1-2x)Ca(x)Th(x)Ba2Cu3O7-delta with 0 less-than-or-equal-to x less-than-or-equal-to 0.1. With increasing x, a decreased puckering of the Cu-O planes is found. Changes in copper oxygen distances are generally small. Evidence is found for a small increase in the distance between Cu(1) and O(4) (on the cell edge) with increased CaTh concentration. An increased oxygen disorder is observed at x = 0.1.

Keyword
SUPERCONDUCTIVITY, YBA2CU3O7-X
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:kth:diva-50009 (URN)10.1016/0038-1098(92)90771-Z (DOI)A1992HF93400013 ()
Available from: 2011-12-01 Created: 2011-12-01 Last updated: 2017-12-08Bibliographically approved

Open Access in DiVA

No full text

Authority records BETA

Andersson, Magnus

Search in DiVA

By author/editor
Andersson, Magnus
By organisation
Physics
Condensed Matter Physics

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 123 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf