Open Access. Powered by Scholars. Published by Universities.®
Electromagnetics and Photonics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Electromagnetics and Photonics
Cation Engineering Of Cu-Ferrite Films Deposited By Alternating Target Laser Ablation Deposition, Aria Yang, Zhaohui Chen, Shaheen M. Islam, Carmine Vittoria, V. G. Harris
Cation Engineering Of Cu-Ferrite Films Deposited By Alternating Target Laser Ablation Deposition, Aria Yang, Zhaohui Chen, Shaheen M. Islam, Carmine Vittoria, V. G. Harris
Vincent G. Harris
Epitaxial copper ferrite thin films were deposited on MgO substrates by the alternating target laser ablation deposition method. A series of films was studied to explore the impact of oxygen operating pressure, substrate temperature, and the ratio of laser shots incident on each target upon the magnetic, structural, and atomic structural properties. The highest saturation magnetization, 2800 G, was achieved at a 90 mTorr oxygen pressure and at 650 degrees C for the substrate temperature. This value is 65% higher than the room temperature magnetization for bulk equilibrium samples. The inversion parameter was measured by extended x-ray absorption fine structure …
Effect Of Growth Temperature On The Magnetic, Microwave, And Cation Inversion Properties On Nife₂O₄ Thin Films Deposited By Pulsed Laser Ablation Deposition, C. N. Chinnasamy, S. D. Yoon, Aria Yang, Ashish Baraskar, C. Vittoria, V. G. Harris
Effect Of Growth Temperature On The Magnetic, Microwave, And Cation Inversion Properties On Nife₂O₄ Thin Films Deposited By Pulsed Laser Ablation Deposition, C. N. Chinnasamy, S. D. Yoon, Aria Yang, Ashish Baraskar, C. Vittoria, V. G. Harris
Vincent G. Harris
First principles band structure calculations suggest that the preferential occupation of Ni2+ ions on the tetrahedral sites in NiFe₂O₄ would lead to an enhancement of the exchange integral and subsequently the Néel temperature and magnetization. To this end, we have deposited NiFe₂O₄films on MgO substrates by pulsed laser deposition. The substrate temperature was varied from 700 to 900°C at 5 mTorr of O₂ pressure. The films were annealed at 1000°C for different times prior to their characterization. X-ray diffraction spectra showed either (100) or (111) orientation with the spinel structure dependent on the substrate orientation. Magnetic studies showed a magnetization …