A. K. Hassan

Publication List Details

Period

1993 - 2006

Number

24

Co-Authors

Resistivity network and structural model of the oxide cathode for CRT application (2006)

Hashim, A. A., Barratt, D. S., Hassan, A. K., Evans-Freeman, J. H., Nabok, A. V.

In this paper, the electrical properties of oxide cathode and oxide cathode plus, supplied by LG Philips Displays, have been investigated in relation to different cathode activation regimes and...

Broad-band quasi-optical HF-EPR spectroscopy: Application to the study of the ferrous iron center from a rubredoxin mutant (2006)

Barra, A. L., Hassan, A. K., Janoschka, A., Schmidt, C. L., Schünemann, V.

High-frequency electron paramagnetic resonance (HF-EPR) allows obtaining detailed information on the anisotropy of integer-spin systems, which are usually silent at conventional EPR frequencies (X-...

Collective character of spin excitations in a system of Mn$^{2+}$ spins coupled to a two-dimensional electron gas (2003)

Teran, F. J., Potemski, M., Maude, D. K., Plantier, D., Hassan, A. K., Sachrajda, A., ...

We have studied the low energy spin excitations in n-type CdMnTe based dilute magnetic semiconductor quantum wells. For magnetic fields for which the energies for the excitation of free carriers and...

Macroscopic Anisotropy and Symmetry Breaking in the Pyrochlore Antiferromagnet Gd$_{2}$Ti$_{2}$O$_{7}$} (2002)

Hassan, A. K., Lévy, L. P., Darie, C., Strobel, P.

In the Heisenberg antiferromagnet $Gd_2Ti_2O_7$, the exchange interactions are geometrically frustrated by the pyrochlore lattice structure. This ESR study reveals a strong temperature dependent...

How and why the characterization of magnetic materials can give directions in the methodological development in high field-high frequency EPR (2002)

Brunel, L. C., Caneschi, A., Dei, A., Friselli, D., Gatteschi, D., Hassan, A. K., ...

The experimental problems linked to the use of the ultra-wide band high field-high frequency Electron Paramagnetic Resonance (HF2-EPR) spectrometers are illustrated with some key examples. The single...

Resistively detected EPR of Mn2+ ions coupled to the 2DEG in the quantum Hall regime (2002)

Teran, F. J., Potemski, M., Maude, D. K., Hassan, A. K., Andrearczyk, T., Jaroszynski, J., ...

An investigation of resistively detected electron paramagnetic resonance (EPR) of Mn2+ ions imbedded in CdMnTe modulation- doped quantum well structure reveals the strong influence of the 2D-free...

Extrinsic versus intrinsic high-field and high-frequency EPR properties of magnetic materials (2001)

Lenci, L., Martinelli, M., Massa, C. A., Pardi, L. A., Ricci, I., Hassan, A. K., ...

Performing high-field and high-frequency electron paramagnetic resonance (HFHFEPR) experiments on a one-dimensional (I-D) magnetic system, we put in evidence a number of effects that can be...

High-field Electron Spin Resonance of Cu_{1-x}Zn_{x}GeO_{3} (1997)

Hassan, A. K., Pardi, L. A., Martins, G. B., Cao, G., Brunel, L-C.

High-Field Electron Spin Resonance measurements were made on powder samples of Cu_{1-x}Zn_{x}GeO_{3} (x=0.00, 0.01, 0.02, 0.03 and 0.05) at different frequencies (95, 110, 190, 220, 330 and 440 GHz)...

Suppression of initiation defects of chromosome replication in Bacillus subtilis dnaA and oriC-deleted mutants by integration of a plasmid replicon into the chromosomes.

Hassan, A K, Moriya, S, Ogura, M, Tanaka, T, Kawamura, F, Ogasawara, N

We constructed Bacillus subtilis strains in which chromosome replication initiates from the minimal replicon of a plasmid isolated from Bacillus natto, independently of oriC. Integration of the...

Suppression of initiation defects of chromosome replication in Bacillus subtilis dnaA and oriC-deleted mutants by integration of a plasmid replicon into the chromosomes.

Hassan, A K, Moriya, S, Ogura, M, Tanaka, T, Kawamura, F, Ogasawara, N

We constructed Bacillus subtilis strains in which chromosome replication initiates from the minimal replicon of a plasmid isolated from Bacillus natto, independently of oriC. Integration of the...