Open Access. Powered by Scholars. Published by Universities.®
Materials Science and Engineering Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Neutron Diffraction (2)
- Antiferromagetic Materials (1)
- Antiferromagnetic Materials (1)
- Barium compounds (1)
- Calcium Compounds (1)
-
- Crystal Field Interactions (1)
- Crystal Structure (1)
- Curie Temperature (1)
- Exchange Interactions (Electron) (1)
- Ferromagnetic-Antiferromagnetic Transitions (1)
- Germanium Alloys (1)
- High-temperature superconductors (1)
- Holmium Alloys (1)
- Lanthanum compounds (1)
- Magnetic Moments (1)
- Magnetic Structure (1)
- Manganese Alloys (1)
- Neodymium Compounds (1)
- Neutrons - Diffraction (1)
- Paramagnetic Materials (1)
- Silicon Alloys (1)
- Space groups (1)
- Superconducting Transition Temperature (1)
- Terbium Alloys (1)
- Titanium Alloys (1)
- X-Ray Diffraction (1)
Articles 1 - 3 of 3
Full-Text Articles in Materials Science and Engineering
Neutron Structural Studies On The Superconducting (Nd₁₋ₓcax)(Ba₁.₆La₀.₄)Cu₃Oz System, Amish G. Joshi, R. G. Kulkarni, William B. Yelon, Ram Prasad, M. R. Gonal
Neutron Structural Studies On The Superconducting (Nd₁₋ₓcax)(Ba₁.₆La₀.₄)Cu₃Oz System, Amish G. Joshi, R. G. Kulkarni, William B. Yelon, Ram Prasad, M. R. Gonal
Physics Faculty Research & Creative Works
We have investigated the influence of Ca ion substitution on the structural and superconducting properties of (Nd1−xCax)(Ba1.6La0.4)Cu3Oz system. Magnetization, x-ray diffraction, and neutron diffraction studies have been carried out on a series of compounds with x=0.0-0.6. The superconducting transition temperature Tc, determined from magnetization measurements, increases with increasing Ca2+ substitution. Neutron diffraction studies reveal that these compounds crystallize in a tetragonal structure (space group P4/mmm). A detailed analysis of the neutron diffraction data reveals that Ca and La ions are intermixed at the nominal Ba and Nd sites. While a major fraction of Ca ions occupy the usual Nd site, …
Competing Magnetic Interactions In The Intermetallic Compound Ho₂Mn₃Si₅, R. Nirmala, A. V. Morozkin, Jagat Lamsal, Zili Chu, V. Sankaranarayanan, K. Sethupathi, Y. Yamamoto, H. Hori, William B. Yelon, Satish K. Malik
Competing Magnetic Interactions In The Intermetallic Compound Ho₂Mn₃Si₅, R. Nirmala, A. V. Morozkin, Jagat Lamsal, Zili Chu, V. Sankaranarayanan, K. Sethupathi, Y. Yamamoto, H. Hori, William B. Yelon, Satish K. Malik
Physics Faculty Research & Creative Works
The compound Ho2Mn3Si5 exhibits multiple magnetic transitions: (i) an ordering at ~78 K, (ii) a second magnetic transition at ~16 K, and (iii) an anomaly at ~4 K. Its paramagnetic Curie temperature is found to be small but positive. Assuming a free ion effective paramagnetic moment of 10.6µB for Ho3+ ion, the effective paramagnetic moment per Mn in this compound is calculated to be 1.73µB, which indicates the itinerant nature of Mn d electrons. The various transitions in magnetization data are perhaps due to the ordering of rare earth and Mn moments. The magnetization at 2 K in applied fields …
Magnetic Ordering In The Rare Earth Intermetallic Compound Tb₂Ti₃Ge₄: Magnetization And Neutron Diffraction Studies, Satish K. Malik, Jagat Lamsal, R. L. De Almeida, S. Quezado, William B. Yelon, V. O. Garlea, A. V. Morozkin, R. Nirmala
Magnetic Ordering In The Rare Earth Intermetallic Compound Tb₂Ti₃Ge₄: Magnetization And Neutron Diffraction Studies, Satish K. Malik, Jagat Lamsal, R. L. De Almeida, S. Quezado, William B. Yelon, V. O. Garlea, A. V. Morozkin, R. Nirmala
Physics Faculty Research & Creative Works
Magnetization and neutron diffraction studies on a polycrystalline Tb2Ti3Ge4 sample (orthorhombic Sm5Ge4-type structure, space group Pnma, No. 62) have been carried out. This compound is found to order antiferromagnetically at ~18 K (TN). The magnetization (M) versus field (H) isotherms obtained at 2, 3, 5, and 10 K indicate a field-induced antiferromagnetic to ferromagnetic transition in fields of the order of 0.5 T. The saturation magnetization value at 2.5 K (M extrapolated to 1/H-->0) is only ~5.6µB/Tb3+, suggesting the possible presence of crystal field effects with or without a persisting antiferromagnetic component. Neutron powder diffraction data at 10 K …