Self-assembled, rare earth tantalate pyrochlore nanoparticles for superior flux pinning in YBa2Cu3O7−δ films. Harrington, S. A., Durrell, J. H., Maiorov, B., Wang, H., Wimbush, S. C., Kursumovic, A., Lee, J. H., & MacManus-Driscoll, J. L. Superconductor Science and Technology, 22:022001, 2009.
doi  abstract   bibtex   
Addition of pyrochlore rare earth tantalate phases, RE3TaO7 (RTO, where RE = rare earth, Er, Gd and Yb) to YBa2Cu3O7−δ (YBCO) is shown to vastly improve pinning, without being detrimental to the superconducting transition temperature. The closely lattice matched to RTO phase provides a lower interfacial energy with YBCO than BaZrO3 (BZO) and produces very fine (∼5 nm) particles with high linearity in their self-assembly along c. Critical current densities of 0.86, 0.38 MA cm−2 at 1 and 3 T (for fields) parallel to the c axis were recorded at 77 K in 0.5–1.0 μm thick films and a transition temperature of 92 K was observed even in the highest level doped sample (8 mol%).
@article{harrington_self-assembled_2009,
	title = {Self-assembled, rare earth tantalate pyrochlore nanoparticles for superior flux pinning in {YBa2Cu3O7}−δ films},
	volume = {22},
	issn = {0953-2048},
	doi = {10.1088/0953-2048/22/2/022001},
	abstract = {Addition of pyrochlore rare earth tantalate phases, RE3TaO7 (RTO, where RE = rare earth, Er, Gd and Yb) to YBa2Cu3O7−δ (YBCO) is shown to vastly improve pinning, without being detrimental to the superconducting transition temperature. The closely lattice matched to RTO phase provides a lower interfacial energy with YBCO than BaZrO3 (BZO) and produces very fine (∼5 nm) particles with high linearity in their self-assembly along c. Critical current densities of 0.86, 0.38 MA cm−2 at 1 and 3 T (for fields) parallel to the c axis were recorded at 77 K in 0.5–1.0 μm thick films and a transition temperature of 92 K was observed even in the highest level doped sample (8 mol\%).},
	language = {en},
	journal = {Superconductor Science and Technology},
	author = {Harrington, S. A. and Durrell, J. H. and Maiorov, B. and Wang, H. and Wimbush, S. C. and Kursumovic, A. and Lee, J. H. and MacManus-Driscoll, J. L.},
	year = {2009},
	pages = {022001}
}

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