Effects of x in Yb1−xGdxBa2Cu3O7−y samples on c-lattice parameter, activation energy and its magnetic power constant

Dependency of c-lattice parameter, activation energy and its magnetic power constant on x in Y1−xYbx/2Gdx/2Ba2Cu3O7−y superconductors

“…From Fig. 1, the optimal sintering temperature for all the samples was selected to be 890 • C as it was determined in our previous work [7]. Fig.…”

“…temperature T c [1] and the transition temperature range ( T c ) from normal state to superconductivity. In our previous work [7], it was shown that c-lattice parameter, activation energy and its magnetic power constant mostly depend on x in Yb 1−x Gd x 123 superconducting structure.…”

“…Several attempts [1][2][3][4][5][6][7] have been made to study the effects of substituting with rare-earth elements such as Yb and Gd for Y atom in YBa 2 Cu 3 O 7−y (Y123) structure. In order to find an oxide superconductor with higher critical current density (J c ), some scientists [8,9] substituted almost all rare-earth metals instead of yttrium (Y) in YBCO compound.…”

“…Because of the fact that an ionic radius of Y atom is smaller than that of Gd and also bigger than that of 0925 Yb, when Gd and Yb atoms are substituted together in Y123 structure at the same ratio of x/2, the effects of three different atoms to change c-lattice parameter, activation energy and its magnetic power constant were investigated. Although numerous studies have been undertaken on Yb123 [11], (Yb,Gd)123 [7,8,12,13], and Gd123 [6,14], no studies on the effect of x on the activation energy of such Y 1−x Yb x/2 Gd x/2 Ba 2 Cu 3 O 7−y polycrystalline samples have been reported.…”

Effect of Doping of Zn and Ca into ErBa2Cu3O7−δ Superconductor Prepared via Co-precipitation Method

“…Essentially, by varying the type and amount of dopant, different properties could be expected, which offers exciting possibilities to prepare material with desired properties. Several re- ports showed that doping causes a prominent effect towards structural, electrical, and magnetic properties of the superconductor [6,7], and [8]. Researchers found that valence of dopant plays an important role in determining the effective copper valence where the T c is influenced [9].…”