Effcct of Doping on the Structural Changes Associated with the High-Temperature Phase Transition of LiNH4S04 Crystals

Research Authors
M. A. Gaffar, Y. A. Badr and A. M. Mebed
Research Department
Department of physics
Research Journal
Phys. Stat. Sol. (a)
Research Member
Mohamed Abdel-aziz Mohamed Gaafar
Research Pages
pp. 143-152
Research Rank
1
Research Vol
Vol. 148
Research Year
1994

Conditions Affecting the Growth Mechanism of Pure and Doped Ammonium Sulphate Single Crystals

Research Authors
M. A. Gaffar, Galal A. Mohamed, S. M. El-Halwany and M. A. El- Maghraby
Research Department
Department of physics
Research Journal
Bull. Fac. Sci., ASSIUT UNIV
Research Member
Elmaghrebi Mohamed Abo Elhdid Elmaghrebi
Research Pages
pp. 77-88
Research Rank
1
Research Vol
Vol. 23, No. (l-D)
Research Year
1994

Conditions Affecting the Growth Mechanism of Pure and Doped Ammonium Sulphate Single Crystals

Research Authors
M. A. Gaffar, Galal A. Mohamed, S. M. El-Halwany and M. A. El- Maghraby
Research Department
Department of physics
Research Journal
Bull. Fac. Sci., ASSIUT UNIV
Research Member
Salah El-deen Mohamed Mohamed El-halawany
Research Pages
pp. 77-88
Research Rank
1
Research Vol
Vol. 23, No. (l-D)
Research Year
1994

Conditions Affecting the Growth Mechanism of Pure and Doped Ammonium Sulphate Single Crystals

Research Authors
M. A. Gaffar, Galal A. Mohamed, S. M. El-Halwany and M. A. El- Maghraby
Research Department
Department of physics
Research Journal
Bull. Fac. Sci., ASSIUT UNIV
Research Member
Galal Abdel-Sadiq Mohamed
Research Pages
pp. 77-88
Research Rank
1
Research Vol
Vol. 23, No. (l-D)
Research Year
1994

Conditions Affecting the Growth Mechanism of Pure and Doped Ammonium Sulphate Single Crystals

Research Authors
M. A. Gaffar, Galal A. Mohamed, S. M. El-Halwany and M. A. El- Maghraby
Research Department
Department of physics
Research Journal
Bull. Fac. Sci., ASSIUT UNIV
Research Member
Mohamed Abdel-aziz Mohamed Gaafar
Research Pages
pp. 77-88
Research Rank
1
Research Vol
Vol. 23, No. (l-D)
Research Year
1994

Investigations on the Existence of a High-Temperature Phase Transition in Ammonium Sulphate Crystals

Research Abstract
The existence of a high-temperature phase transition in ammonium sulphate (AS) crystals is discussed. The DC electrical conductivity and the dielectric permittivity in the temperature range 300-460 K are measured and the results are examined trying to detect the proposed phase transition. The results indicate no evidence for a ferroelectric phase transition, but the anomaly observed at 423 K simply is the result of variations in the conduction mechanism which could be attributed to an order-disorder type of phase transition
Research Authors
M. A. Gaffar, S. M. El-Halwany, Galal A. Mohamed and M. A. El- Maghraby
Research Department
Department of physics
Research Journal
Physica B
Research Member
Elmaghrebi Mohamed Abo Elhdid Elmaghrebi
Research Pages
pp. 284-290
Research Rank
1
Research Vol
Vol. 193
Research Year
1994

Investigations on the Existence of a High-Temperature Phase Transition in Ammonium Sulphate Crystals

Research Abstract
The existence of a high-temperature phase transition in ammonium sulphate (AS) crystals is discussed. The DC electrical conductivity and the dielectric permittivity in the temperature range 300-460 K are measured and the results are examined trying to detect the proposed phase transition. The results indicate no evidence for a ferroelectric phase transition, but the anomaly observed at 423 K simply is the result of variations in the conduction mechanism which could be attributed to an order-disorder type of phase transition
Research Authors
M. A. Gaffar, S. M. El-Halwany, Galal A. Mohamed and M. A. El- Maghraby
Research Department
Department of physics
Research Journal
Physica B
Research Member
Galal Abdel-Sadiq Mohamed
Research Pages
pp. 284-290
Research Rank
1
Research Vol
Vol. 193
Research Year
1994

Investigations on the Existence of a High-Temperature Phase Transition in Ammonium Sulphate Crystals

Research Abstract
The existence of a high-temperature phase transition in ammonium sulphate (AS) crystals is discussed. The DC electrical conductivity and the dielectric permittivity in the temperature range 300-460 K are measured and the results are examined trying to detect the proposed phase transition. The results indicate no evidence for a ferroelectric phase transition, but the anomaly observed at 423 K simply is the result of variations in the conduction mechanism which could be attributed to an order-disorder type of phase transition
Research Authors
M. A. Gaffar, S. M. El-Halwany, Galal A. Mohamed and M. A. El- Maghraby
Research Department
Department of physics
Research Journal
Physica B
Research Member
Salah El-deen Mohamed Mohamed El-halawany
Research Pages
pp. 284-290
Research Rank
1
Research Vol
Vol. 193
Research Year
1994

Investigations on the Existence of a High-Temperature Phase Transition in Ammonium Sulphate Crystals

Research Abstract
The existence of a high-temperature phase transition in ammonium sulphate (AS) crystals is discussed. The DC electrical conductivity and the dielectric permittivity in the temperature range 300-460 K are measured and the results are examined trying to detect the proposed phase transition. The results indicate no evidence for a ferroelectric phase transition, but the anomaly observed at 423 K simply is the result of variations in the conduction mechanism which could be attributed to an order-disorder type of phase transition
Research Authors
M. A. Gaffar, S. M. El-Halwany, Galal A. Mohamed and M. A. El- Maghraby
Research Department
Department of physics
Research Journal
Physica B
Research Member
Mohamed Abdel-aziz Mohamed Gaafar
Research Pages
pp. 284-290
Research Rank
1
Research Vol
Vol. 193
Research Year
1994
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