TY - JOUR
T1 - New Type of Vortex Pinning Structure Effective at Very High Magnetic Fields
AU - Muralidhar, M.
AU - Sakai, N.
AU - Chikumoto, N.
AU - Jirsa, M.
AU - Machi, T.
AU - Nishiyama, M.
AU - Wu, Y.
AU - Murakami, M.
N1 - Funding Information:
This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Ap?>plications and by the Grant Agency of ASCR (Grant No. A1010919).
PY - 2002
Y1 - 2002
N2 - We report on a new type of correlated nanometer-scale pinning structure observed in a melt-processed [Formula presented] (NEG-123). It consists of [Formula presented]-rich clusters in the stoichiometric NEG-123 matrix forming a lamellar array with a period of a few nanometers. These lamellas appear within regular twins, thus representing their fine substructure—sometimes straight, sometimes wavy. This new material structure correlates well with the significant enhancement of pinning at high fields, represented by irreversibility field above 14 T at 77 K ([Formula presented]). We believe that the new pinning medium enables one to significantly broaden the limits for high-field applications.
AB - We report on a new type of correlated nanometer-scale pinning structure observed in a melt-processed [Formula presented] (NEG-123). It consists of [Formula presented]-rich clusters in the stoichiometric NEG-123 matrix forming a lamellar array with a period of a few nanometers. These lamellas appear within regular twins, thus representing their fine substructure—sometimes straight, sometimes wavy. This new material structure correlates well with the significant enhancement of pinning at high fields, represented by irreversibility field above 14 T at 77 K ([Formula presented]). We believe that the new pinning medium enables one to significantly broaden the limits for high-field applications.
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U2 - 10.1103/PhysRevLett.89.237001
DO - 10.1103/PhysRevLett.89.237001
M3 - Article
AN - SCOPUS:0037011703
SN - 0031-9007
VL - 89
JO - Physical Review Letters
JF - Physical Review Letters
IS - 23
ER -