Experimental observation of the lock-in transition in a Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} crystal near the lower critical field

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.13319· OSTI ID:389343

Kolesnik, S; Skoskiewicz, T; Igalson, J ^[1]; Tarnawski, Z ^[2]

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1. Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, PL-02668 Warszawa (Poland)
2. Solid State Physics Department, Faculty of Physics and Nuclear Techniques, University of Mining and Metallurgy, Mickiewicza 30, PL-30059 Krakow (Poland)

Isothermal remanent magnetization of a Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} crystal has been studied as a function of the applied field intensity and orientation. The modulus and direction of the magnetization vector have been determined. At the lower critical field ({ital H}{sub {ital c}1}) boundary, the magnetization vector is directed nearly parallel to the {ital a}-{ital b} plane for an extended angular range. We attribute this effect to the lock-in transition of vortices. Field-induced reorientation of the magnetization vector and hence the vortex locked-unlocked transition has been detected. The determined angular dependence of {ital H}{sub {ital c}1} gives the effective mass ratio {gamma}{sup 2}{approx_equal}70. We describe our results in terms of the three-dimensional London theory. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 389343
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 18 Vol. 54; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRITICAL FIELD
HIGH-TC SUPERCONDUCTORS
MAGNETIC PROPERTIES
MAGNETIZATION
MIXED STATE
PHASE TRANSFORMATIONS
STRONTIUM OXIDES
TEMPERATURE RANGE 0000-0013 K