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Electrical and Computer Engineering

Selected Works

2011

Magnetic anisotropy

Articles 1 - 4 of 4

Full-Text Articles in Engineering

Magnetic Anisotropy And Crystalline Texture In Bao(Fe₂O₃)₆ Thin Films Deposited On Gan/Al₂O₃, Paul R. Ohodnicki, K. Y. Goh, Yuranan Hanlumyuang, K. Ramos, Michael E. Mchenry, Zhuhua Cai, Katherine Ziemer, Hadis Morkoc, Necmi Biyikli, Zhaohui Chen, C. Vittoria, Vincent Girard Harris (1962-) Jun 2011

Magnetic Anisotropy And Crystalline Texture In Bao(Fe₂O₃)₆ Thin Films Deposited On Gan/Al₂O₃, Paul R. Ohodnicki, K. Y. Goh, Yuranan Hanlumyuang, K. Ramos, Michael E. Mchenry, Zhuhua Cai, Katherine Ziemer, Hadis Morkoc, Necmi Biyikli, Zhaohui Chen, C. Vittoria, Vincent Girard Harris (1962-)

Carmine Vittoria

BaO(Fe₂O₃)₆ (BaM) thin films were deposited by pulsed laser deposition on GaN/Al₂O₃ substrates. A pole figure obtained from the (006) reflection indicated that ~81% of the film volume had the c axis tilted less than 5° from the film normal. A low anisotropy field was inferred from vector coil vibrating sample magnetometer (VVSM) measurements. The reduction in Hₐ from literature values and a two-step switching of the easy axis magnetization is postulated to result from interdiffusion and misalignment effects. To alleviate interdiffusion and to improve the c-axis alignment, experiments were repeated with lower deposition temperatures, thinner films, and MgO buffer …


Magnetic Anisotropy And Crystalline Texture In Bao(Fe₂O₃)₆ Thin Films Deposited On Gan/Al₂O₃, Paul R. Ohodnicki, K. Y. Goh, Yuranan Hanlumyuang, K. Ramos, Michael E. Mchenry, Zhuhua Cai, Katherine Ziemer, Hadis Morkoc, Necmi Biyikli, Zhaohui Chen, C. Vittoria, Vincent Girard Harris (1962-) Apr 2011

Magnetic Anisotropy And Crystalline Texture In Bao(Fe₂O₃)₆ Thin Films Deposited On Gan/Al₂O₃, Paul R. Ohodnicki, K. Y. Goh, Yuranan Hanlumyuang, K. Ramos, Michael E. Mchenry, Zhuhua Cai, Katherine Ziemer, Hadis Morkoc, Necmi Biyikli, Zhaohui Chen, C. Vittoria, Vincent Girard Harris (1962-)

Vincent G. Harris

BaO(Fe₂O₃)₆ (BaM) thin films were deposited by pulsed laser deposition on GaN/Al₂O₃ substrates. A pole figure obtained from the (006) reflection indicated that ~81% of the film volume had the c axis tilted less than 5° from the film normal. A low anisotropy field was inferred from vector coil vibrating sample magnetometer (VVSM) measurements. The reduction in Hₐ from literature values and a two-step switching of the easy axis magnetization is postulated to result from interdiffusion and misalignment effects. To alleviate interdiffusion and to improve the c-axis alignment, experiments were repeated with lower deposition temperatures, thinner films, and MgO buffer …


Magnetic Anisotropy And Crystalline Texture In Bao(Fe₂O₃)₆ Thin Films Deposited On Gan/Al₂O₃, Paul R. Ohodnicki, K. Y. Goh, Yuranan Hanlumyuang, K. Ramos, Michael E. Mchenry, Zhuhua Cai, Katherine Ziemer, Hadis Morkoc, Necmi Biyikli, Zhaohui Chen, C. Vittoria, Vincent Girard Harris (1962-) Jan 2011

Magnetic Anisotropy And Crystalline Texture In Bao(Fe₂O₃)₆ Thin Films Deposited On Gan/Al₂O₃, Paul R. Ohodnicki, K. Y. Goh, Yuranan Hanlumyuang, K. Ramos, Michael E. Mchenry, Zhuhua Cai, Katherine Ziemer, Hadis Morkoc, Necmi Biyikli, Zhaohui Chen, C. Vittoria, Vincent Girard Harris (1962-)

Katherine S. Ziemer

BaO(Fe₂O₃)₆ (BaM) thin films were deposited by pulsed laser deposition on GaN/Al₂O₃ substrates. A pole figure obtained from the (006) reflection indicated that ~81% of the film volume had the c axis tilted less than 5° from the film normal. A low anisotropy field was inferred from vector coil vibrating sample magnetometer (VVSM) measurements. The reduction in Hₐ from literature values and a two-step switching of the easy axis magnetization is postulated to result from interdiffusion and misalignment effects. To alleviate interdiffusion and to improve the c-axis alignment, experiments were repeated with lower deposition temperatures, thinner films, and MgO buffer …


Electrical Tuning Of Magnetism In Fe₃O₄/Pzn–Pt Multiferroic Heterostructures Derived By Reactive Magnetron Sputtering, Ming Liu, Ogheneyunume Obi, Zhuhua Cai, Jing Lou, Guomin Yang, Katherine S. Ziemer, Nian X. Sun Jan 2011

Electrical Tuning Of Magnetism In Fe₃O₄/Pzn–Pt Multiferroic Heterostructures Derived By Reactive Magnetron Sputtering, Ming Liu, Ogheneyunume Obi, Zhuhua Cai, Jing Lou, Guomin Yang, Katherine S. Ziemer, Nian X. Sun

Katherine S. Ziemer

Strong magnetoelectric (ME) coupling was demonstrated in Fe₃O₄/PZN–PT (lead zinc niobate–lead titanate) multiferroic heterostructures obtained through a sputter deposition process. The dependence of the magnetic anisotropy on the electric field (E-field) is theoretically predicted and experimentally observed by ferromagnetic resonance spectroscopy. A large tunable in-plane magnetic anisotropy of up to 600 Oe, and tunable out-of-plane anisotropy of up to 400 Oe were observed in the Fe₃O₄/PZN–PT multiferroic heterostructures, corresponding to a large ME coefficient of 100 Oe cm/kV in plane and 68 Oe cm/kV out of plane, which match well with predicted results. In addition, the electric field manipulation of …