A
Alex Panchula
Researcher at First Solar
Publications - 47
Citations - 6233
Alex Panchula is an academic researcher from First Solar. The author has contributed to research in topics: Magnetoresistance & Spin polarization. The author has an hindex of 24, co-authored 47 publications receiving 5798 citations. Previous affiliations of Alex Panchula include Samsung & Iowa State University.
Papers
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Journal ArticleDOI
Giant tunnelling magnetoresistance at room temperature with MgO (100) tunnel barriers
Stuart S. P. Parkin,Christian Kaiser,Alex Panchula,Philip M. Rice,Brian M. Hughes,Mahesh G. Samant,See-Hun Yang +6 more
TL;DR: Sputter-deposited polycrystalline MTJs grown on an amorphous underlayer, but with highly oriented MgO tunnel barriers and CoFe electrodes, exhibit TMR values of up to ∼220% at room temperature and ∼300% at low temperatures, which will accelerate the development of new families of spintronic devices.
Journal ArticleDOI
Magnetically engineered spintronic sensors and memory
Stuart S. P. Parkin,Xin Jiang,Christian Kaiser,Alex Panchula,Kevin P. Roche,Mahesh G. Samant +5 more
TL;DR: The magnetic tunnel junction (MTJ) as discussed by the authors is an example of spintronic materials in which the flow of spin-polarized electrons is manipulated by controlling, via magnetic fields, the orientation of magnetic moments in inhomogeneous magnetic thin film systems.
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Spin-transfer torque switching in magnetic tunnel junctions and spin-transfer torque random access memory
Zhitao Diao,Zhanjie Li,Shengyuang Wang,Yunfei Ding,Alex Panchula,Eugene Chen,Lien-Chang Wang,Yiming Huai +7 more
TL;DR: In this paper, experimental and numerical results of current-driven magnetization switching in magnetic tunnel junctions were presented, and three distinct switching modes, thermal activation, dynamic reversal, and precessional process, were identified within the experimental parameter space.
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Thermodynamics of spin S = 1 / 2 antiferromagnetic uniform and alternating-exchange Heisenberg chains
David C. Johnston,R. K. Kremer,Matthias Troyer,Xun-Li Wang,Andreas Klümper,S.L. Bud'ko,Alex Panchula,Paul C. Canfield +7 more
TL;DR: In this paper, the magnetic susceptibility and specific heat of the Heisenberg chain were studied for the entire range $0l~\ensuremath{\alpha}l~1$ of the alternation parameter of the alternating-exchange parameter.
Journal ArticleDOI
Spin transfer switching in dual MgO magnetic tunnel junctions
Zhitao Diao,Alex Panchula,Yunfei Ding,Mahendra Pakala,Shengyuan Wang,Zhanjie Li,Dmytro Apalkov,Hideyasu Nagai,A. Driskill-Smith,Lien-Chang Wang,Eugene Chen,Yiming Huai +11 more
TL;DR: In this article, a dual magnetic tunnel junction (MTJ) structure consisting of two MgO insulating barriers of different resistances, two pinned reference layers aligned antiparallel to one another, and a free layer embedded between the two barriers has been developed.