TY - JOUR
T1 - Magnetic and mössbauer studies of (formula presented) (formula presented) and Fe)
AU - Felner, I.
AU - Asaf, U.
AU - Nowik, I.
AU - Bradaric, I.
PY - 2002
Y1 - 2002
N2 - (formula presented) is a perovskite with an orthorhombic distortion and shows the characteristics of spin-glass behavior below (formula presented) Magnetic studies of polycrystalline (formula presented) (formula presented) reveal that a ferromagnetic transition at (formula presented) appears regardless of the nonmagnetic Ti concentration. On the other hand, magnetic and Mössbauer effect studies show that (formula presented) of (formula presented) (up to (formula presented) is similar to that of pure (formula presented) however, the Fe induces a ferromagnetic structure. Charge compensation, which is assumed to be present upon (formula presented) substitution, induces the appearance of low-spin (formula presented) ions, which reduce the paramagnetic moment. Huge magnetic hysteresis loops are observed at 5 K, with coercive fields up to 30 kOe. A second magnetic transition around 250 K is observed for Fe concentrations of (formula presented) and 0.35, which is probably caused by Fe-rich clusters. This behavior is consistent with inhomogeneous ferromagnetism found in other perovskite systems.
AB - (formula presented) is a perovskite with an orthorhombic distortion and shows the characteristics of spin-glass behavior below (formula presented) Magnetic studies of polycrystalline (formula presented) (formula presented) reveal that a ferromagnetic transition at (formula presented) appears regardless of the nonmagnetic Ti concentration. On the other hand, magnetic and Mössbauer effect studies show that (formula presented) of (formula presented) (up to (formula presented) is similar to that of pure (formula presented) however, the Fe induces a ferromagnetic structure. Charge compensation, which is assumed to be present upon (formula presented) substitution, induces the appearance of low-spin (formula presented) ions, which reduce the paramagnetic moment. Huge magnetic hysteresis loops are observed at 5 K, with coercive fields up to 30 kOe. A second magnetic transition around 250 K is observed for Fe concentrations of (formula presented) and 0.35, which is probably caused by Fe-rich clusters. This behavior is consistent with inhomogeneous ferromagnetism found in other perovskite systems.
UR - http://www.scopus.com/inward/record.url?scp=85038929667&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.66.054418
DO - 10.1103/PhysRevB.66.054418
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AN - SCOPUS:85038929667
SN - 1098-0121
VL - 66
SP - 1
EP - 7
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 5
ER -