TY - JOUR
T1 - Behaviour of the second magnetization peak in La2-xSrxCuO4 single crystals upon entering the doping domain of static stripe order
AU - Miu, L.
AU - Ionescu, A. M.
AU - Ivan, I.
AU - Miu, D.
AU - Adachi, T.
AU - Omori, K.
AU - Koike, Y.
N1 - Funding Information:
The present work is supported by UEFISCDI Romania at Bucharest-Magurele (grants PN II PT PCCA 7/2012 and 138/2012 ), and by JSPS at Tohoku University . The kind assistance of the Alexander von Humboldt Foundation is gratefully acknowledged.
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/12/15
Y1 - 2015/12/15
N2 - The occurrence of a second magnetization peak (SMP) on the dc magnetization curves of superconducting single crystals with random quenched disorder in increasing external magnetic field H is quite common. Many models for this intriguing phenomenon have been proposed so far, but its origin is still under strong debate. Optimally doped and overdoped La2-xSrxCuO4 single crystals (x ≥ 0.15) exhibit an SMP over a large temperature interval, up to very close to the critical temperature. By decreasing doping, it was found that with H oriented along the c axis the SMP completely disappears in the doping domain of well developed static charge and spin stripes (x ∼ 1/8), reappearing for x ≤ 0.10. This behaviour follows the instability of the Bragg vortex glass generated by the static stripe order (as revealed by small-angle neutron scattering experiments), which is confirmed by our magnetization relaxation measurements. If H is along the (a, b) planes, the SMP is observed for all investigated specimens. The presented analysis supports the scenario in which the SMP is generated by the pinning-induced disordering of the low-field Bragg vortex glass in the dynamic conditions of dc magnetic measurements.
AB - The occurrence of a second magnetization peak (SMP) on the dc magnetization curves of superconducting single crystals with random quenched disorder in increasing external magnetic field H is quite common. Many models for this intriguing phenomenon have been proposed so far, but its origin is still under strong debate. Optimally doped and overdoped La2-xSrxCuO4 single crystals (x ≥ 0.15) exhibit an SMP over a large temperature interval, up to very close to the critical temperature. By decreasing doping, it was found that with H oriented along the c axis the SMP completely disappears in the doping domain of well developed static charge and spin stripes (x ∼ 1/8), reappearing for x ≤ 0.10. This behaviour follows the instability of the Bragg vortex glass generated by the static stripe order (as revealed by small-angle neutron scattering experiments), which is confirmed by our magnetization relaxation measurements. If H is along the (a, b) planes, the SMP is observed for all investigated specimens. The presented analysis supports the scenario in which the SMP is generated by the pinning-induced disordering of the low-field Bragg vortex glass in the dynamic conditions of dc magnetic measurements.
KW - LaSrCuO single crystals
KW - Magnetization relaxation
KW - Second magnetization peak
KW - Static stripe order
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U2 - 10.1016/j.physc.2015.08.013
DO - 10.1016/j.physc.2015.08.013
M3 - Article
AN - SCOPUS:84942342500
VL - 519
SP - 79
EP - 84
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
ER -