2023
B.W. Casas, Y. L, A. Moon, Y. Xin, C. McKeever, J. Macy, A.K. Petford‐Long, C.M. Phatak, E.J.G. Santos, E.S. Choi, and L. Balicas, “Coexistence of Merons with Skyrmions in the Centrosymmetric van der Waals Ferromagnet Fe 5‐xGeTe 2,” Advanced Materials, 2212087 (2023).
Y. Li, X. Hu, A. Fereidouni, R. Basnet, K. Pandey, J. Wen, Y. Liu, H. Zheng, H.O.H. Churchill, J. Hu, A.K. Petford-Long, and C. Phatak, “Visualizing the Effect of Oxidation on Magnetic Domain Behavior of Nanoscale Fe 3 GeTe 2 for Applications in Spintronics,” ACS Appl. Nano Mater. 6(6), 4390–4397 (2023).
A.R.C. McCray, Y. Li, E. Qian, Y. Li, W. Wang, Z. Huang, X. Ma, Y. Liu, D.Y. Chung, M.G. Kanatzidis, A.K. Petford‐Long, and C. Phatak, “Direct Observation of Magnetic Bubble Lattices and Magnetoelastic Effects in van der Waals Cr 2 Ge 2 Te 6,” Adv Funct Materials, 2214203 (2023).
T. Cote, A.K. Petford-Long, and C. Phatak, “Direct observation of magnetic ordering induced via systematic lattice disorder in artificial rhombus spin ices,” Nanoscale, (2023).
2022
Y. Li, R. Basnet, K. Pandey, J. Hu, W. Wang, X. Ma, A.R.C. McCray, A.K. Petford-Long, and C. Phatak, “Field-Dependent Magnetic Domain Behavior in van der Waals Fe3GeTe2,” Jom 74(6), 2310–2318 (2022).
Y. Li, F. Barrows, A.R.C. McCray, T. Cote, D. Friedman, R.N.S. Divan, A.K. Petford-Long, and C. Phatak, “Geometric control of emergent antiferromagnetic order in coupled artificial spin ices,” Cell Reports Physical Science 3(4), 100846 (2022).
A. Talaat, J. Egbu, C. Phatak, K. Byerly, M.E. McHenry, and P.R. Ohodnicki, “Nanostructure refinement and phase formation of flash annealed FeNi-based soft magnetic alloys,” Materials Research Bulletin 152, 111839 (2022).
V. Brajuskovic, A. McCray, Y. Zhang, and C. Phatak, “In situ observation of the magnetization configuration and reversal in cylindrical nanowires,” APL Materials 10(8), 081109 (2022).
Y. Li, R. Basnet, K. Pandey, J. Hu, W. Wang, X. Ma, A.R.C. McCray, A.K. Petford-Long, and C. Phatak, “In-situ Magnetic Domain Behavior in van der Waals Fe 3 GeTe 2,” Microscopy and Microanalysis 28(S1), 1776–1777 (2022).
A.R.C. McCray, Y. Li, R. Basnet, K. Pandey, J. Hu, D. Phelan, X. Ma, A.K. Petford-Long, and C. Phatak, “Evolution of Skyrmion Lattice Order in the van der Waals Ferromagnet Fe 3 GeTe 2,” Microscopy and Microanalysis 28(S1), 2326–2327 (2022).
A.R.C. McCray, A.K. Petford-Long, and C. Phatak, “Simulation-Trained Machine Learning Models for Lorentz Microscopy,” Microscopy and Microanalysis 28(S1), 2980–2982 (2022).
C. Phatak, A.R.C. McCray, Y. Li, T. Zhou, M.J. Cherukara, M.G. Kanatzidis, and A.K. Petford Long, “Advances in Imaging Magnetic Domains in Functional Materials using Lorentz microscopy,” Microscopy and Microanalysis 28(S1), 2570–2571 (2022).
A.R.C. McCray, Y. Li, R. Basnet, K. Pandey, J. Hu, D.P. Phelan, X. Ma, A.K. Petford-Long, and C. Phatak, “Thermal Hysteresis and Ordering Behavior of Magnetic Skyrmion Lattices,” Nano Lett. 22(19), 7804–7810 (2022).
V. K. Vlasko-Vlasov, R. Divan, D. Rosenmann, A. Leishman, U. Welp, S. G. E. te Velthuis, W. K. Kwok, Tunable Magnetic Labyrinth for Abrikosov Vortices, Journal of Superconductivity and Novel Magnetism, 35, 1555-1568 (2022) (https://doi.org/10.1007/s10948-022-06169-w).
F. Barrows, A.K. Petford-Long, and C. Phatak, “3D magnetic imaging using electron vortex beam microscopy,” Commun Phys 5(1), 324 (2022).
W. Haensch, A. Raghunathan, K. Roy, B. Chakrabarti, C.M. Phatak, C. Wang, and S. Guha, “Compute in‐Memory with Non‐Volatile Elements for Neural Networks: A Review from a Co‐Design Perspective,” Advanced Materials, 2204944 (2022).
2021
C. Campbell, Y.M. Lee, K.Y. Cho, Y.-G. Lee, S. Hong, and C. Phatak, “Understanding the Selective Deposition of Li Metal on Nonuniform Electrode Surfaces Using Atomic Force Microscopy,” Journal of The Electrochemical Society 168(2), 020534 (2021).
X. Xu, C. Carr, X. Chen, B.D. Myers, R. Huang, W. Yuan, S. Choi, D. Yi, C. Phatak, and S.M. Haile, “Local Multimodal Electro‐Chemical‐Structural Characterization of Solid‐Electrolyte Grain Boundaries,” Advanced Energy Materials 11(10), 2003309 (2021).
V. Brajuskovic, and C. Phatak, “Understanding curvature effects on the magnetization reversal of patterned permalloy Archimedean spirals,” Applied Physics Letters 118(15), 152409 (2021).
A.R.C. McCray, T. Cote, Y. Li, A.K. Petford-Long, and C. Phatak, “Understanding Complex Magnetic Spin Textures with Simulation-Assisted Lorentz Transmission Electron Microscopy,” Physical Review Applied 15(4), 044025 (2021).
K. Byerly, Y. Krimer, C. Phatak, E. Theisen, and M.E. McHenry, “Magnetostrictive loss reduction through stress relief annealing in an FeNi-based metal amorphous nanocomposite,” Journal of Materials Research 36(14), 2843–2855 (2021).
F. Barrows, H. Arava, C. Zhou, P. Nealey, T. Segal-Peretz, Y. Liu, S. Bakaul, C. Phatak, and A. Petford-Long, “Mesoscale Confinement Effects and Emergent Quantum Interference in Titania Antidot Thin Films,” ACS Nano 15(8), 12935–12944 (2021).
V. Brajuskovic, T.E. Gage, H.H. Liu, I. Arslan, A.K. Petford-Long, and C. Phatak, “Behavior of thermally quenched topological defects in quasicrystal artificial spin ices,” Physical Review B 104(14), 144427 (2021).
Steven R. Spurgeon, Colin Ophus, Lewys Jones, Amanda Petford-Long, Sergei V. Kalinin, Matthew J. Olszta, Rafal E. Dunin-Borkowski, Norman Salmon, Khalid Hattar, Wei-Chang D. Yang, Renu Sharma, Yingge Du, Ann Chiaramonti, Haimei Zheng, Edgar C. Buck, Libor Kovarik, R. Lee Penn, Dongsheng Li, Xin Zhang, Mitsuhiro Murayama, Mitra L. Taheri, “Towards Data-Driven Next-Generation Transmission Electron Microscopy”, Nature Materials 20, 274–279 (2021).
T. Zhou, M. Cherukara, and C. Phatak, “Differential programming enabled functional imaging with Lorentz transmission electron microscopy,” Npj Computational Materials 7(1), 141 (2021).
2020
C. Phatak, C.S. Miller, Z. Thompson, E.B. Gulsoy, and A.K. Petford-Long, “Curved Three-Dimensional Cobalt Nanohelices for Use in Domain Wall Device Applications,” ACS Applied Nano Materials 3(6), 6009–6016 (2020).
X. Xu, Y. Liu, J. Wang, D. Isheim, V.P. Dravid, C. Phatak, and S.M. Haile, “Variability and origins of grain boundary electric potential detected by electron holography and atom-probe tomography,” Nature Materials 19(8), 887–893 (2020).
F. Barrows, X. Xu, S. Haile, C. Phatak, and A. Petford-Long, “Electron Holography Investigation of Resistive Switching CeO 2 / STO Nanocolumns,” Microscopy and Microanalysis 26(S2), 1950–1951 (2020).
X. Xu, F. Barrows, V.P. Dravid, S.M. Haile, and C. Phatak, “Quantifying leakage fields at ionic grain boundaries using off-axis electron holography,” Journal of Applied Physics 128(21), 214301 (2020).
2019
“Understanding curvature effects on magnetic domains in 3D nanostructures”, C. Phatak, S. Miller, Z. Thompson, A. Petford-Long, Microsc. Microanal. 25(S2), 26–27 (2019). DOI: 10.1017/S1431927619000862
“Ferroic materials and devices for flexible memory”, S. Bakaul, M. Islam, M. Alam, Handbook of Flexible and Stretchable Electronics, Chapter 7, CRC Press, pp. 149–164 (2019). ISBN 9781138081581
“Emergent magnetic ordering and topological frustration in quasicrystal artificial spin ices”, F. Barrows, V. Brajuskovic, A.K. Petford-Long and C. Phatak, Phys. Rev. B 99, 094424 (2019). DOI: 10.1103/PhysRevB.99.094424
“Less is more: improved thermal stability and plasmonic response in Au films via the use of subnanometer Ti adhesion layers”, William M. Abbott, Christopher P. Murray, Chuan Zhong, Christopher Smith, Cormac McGuinness, Ehsan Rezvani, Clive Downing, Dermot Daly, Amanda K. Petford-Long, Frank Bello, David McCloskey, andJohn F. Donegan, ACS Appl. Mater Interfaces 11, 7607–7614 (2019). DOI: 10.1021/acsami.8b21193
“Quantifying chiral exchange interaction for Néel-type skyrmions via Lorentz transmission electron microscopy”, W. Jiang, S. Zhang, X. Wang, C. Phatak, Q. Wang, W. Zhang, M.B. Jungfleisch, J.E. Pearson, Y. Liu, J. Zang, X. Chang, A. Petford-Long, A. Hoffmann, S.G.E. te Velthuis, Phys. Rev. B 99, 104402 (2019). DOI: 10.1103/PhysRevB.99.104402
“The Correlation of Optical Transmittance with Structural Evolution in Fluorozirconate Glass (ZLANI) Thin Films as a Function of Thermal Annealing”, Yu Jin1, Charles W. Bond, Russell L. Leonard, Yuzi Liu, Jacqueline A. Johnson and Amanda K. Petford-Long, Microsc. Microanal. 25(S2), 2070–2071 (2019).
“Effect of the dielectric constant of a liquid electrolyte on lithium metal anodes,”, J.Y. Kim, D.O. Shin, T. Chang, K.M. Kim, J. Jeong, J. Park, Y.M. Lee, K.Y. Cho, C. Phatak, S. Hong, and Y.-G. Lee, Electrochim. Acta, vol. 300, pp. 299–305, Mar. 2019.
“Insights into Lithium Surface: Stable Cycling by Controlled 10 μm Deep Surface Relief, Reinterpreting the Natural Surface Defect on Lithium Metal Anode”, J. Ahn, J. Park, J.Y. Kim, S. Yoon, Y.M. Lee, S. Hong, Y.-G. Lee, C. Phatak, and K.Y. Cho, ACS Appl. Energy Mater., vol. 2, no. 8, pp. 5656–5664, Aug. 2019.
2018
“Size effects of micro-pattern on lithium metal surface on the electrochemical performance of lithium metal secondary batteries”, J. Park, D. Kim, D. Jin, C. Phatak, K.Y. Cho, Y.G. Lee, S. Hong, M.H. Ryou, and Y.M. Lee, J. Power Sources, vol. 408, no. September, pp. 136–142, 2018.
“Direct evidence of topological defects in electron waves through nanoscale localized magnetic charge”, C. Phatak and A.K. Petford-Long, Nano Lett. 18, 6989–6994 (2018). DOI: 10.1021/acs.nanolett.8b02915
“Observation of transient states during magnetization reversal in a quasicrystal artificial spin ice”, V. Brajuskovic, A. Addi, C. Phatak, A. K. Petford-Long, Phys. Rev. B 98, 094424 (2018).
“Imaging magnetic domains in functional nanoscale heterostructures using Lorentz microscopy,” C. Phatak, F. Barrows, V. Brajuskovic, S. Bakaul, O. Heinonen, M. De Graef, W. Jiang, S. G. E. te Velthuis, A. Hoffmann, A. Petford-Long, Microsc. Microanal. 24(S1), 910–911 (2018).
“Topological defects and interaction of electron waves and localized magnetic charge”, F. Barrows, A. Petford-Long, C. Phatak, Microsc. Microanal. 24(S1), 940–941 (2018).
“In-situ electron holography study of grain boundaries in cerium oxide”, X. Xu., S. Haile, C. Phatak, Microsc. Microanal. 24(S1), 1466–1467 (2018). DOI: 10.1017/S1431927619011085
“Correlative magnetic imaging of heat-assisted magnetic recording (HAMR) media in cross-section using Lorentz TEM and MFM”, T. Roy Kim, C. Phatak, A. K. Petford-Long, Y. Liu, C. Taylor, B. Zhang, S. Myers, A. Greene, T. Seki, M. Alex, G. A. Bertero, and R. Sinclair, IEEE Trans. Mag. 54(1), 6500105 (2018). DOI: 10.1109/TMAG.2017.2753170
“Ferroelectric domain studies of patterned (001) BiFeO3 by angle-resolved piezoresponse force microscopy”, B. Kim, F.P. Barrows, Y. Sharma, R.S. Katiyar, C. Phatak, A.K. Petford-Long, S. Jeon, S. Hong, Sci.Rep. 8:203 (2018). DOI: 10.1038/s41598-017-18482-9
“Solid state dewetting of thin plasmonic films under focused cw-laser irradiation”, W.M. Abbott, S. Corbett, G. Cunningham, A. Petford-Long, S. Zhang, J.F. Donegan, D. McCloskey, Acta Mater. 145, 210–219 (2018). DOI: 10.1016/j.actamat.2017.12.030
“Reduced electron exposure for energy-dispersive spectroscopy using dynamic sampling”, Y. Zhang, D.G.M. Godaliyadda, N. Ferrier, E.B. Gulsoy, C.A. Bouman, C. Phatak, Ultramicroscopy 184, 90–97 (2018). DOI: 10.1016/j.ultramic.2017.10.015
“Model-Based Iterative Reconstruction of Magnetization using Vector Field Electron Tomography,” K. Aditya Mohan, K.C. Prabhat, C. Phatak, M. De Graef, C. A. Bouman, IEEE Trans. on Comp. Imag. (2018). DOI: 10.1109/TCI.2018.2838454
“3D reconstruction of magnetization from dichroic soft x-ray transmission tomography”, A. Hierro-Rodriguez, D. Gursoy, C. Phatak, C. Quiros, A. Sorrentino, L.M. Alvarez-Prado, M. Velez, J.I. Martin, J.M. Alameda, E. Pereiro, S. Ferrer, J. Synchrotron Rad. 25, 1144–1152 (2018). DOI: 10.1107/S1600577518005829
“Effect of nanopatterning on mechanical properties of lithium anode”, C. Campbell, Y.M. Lee, K.Y. Cho, Y.G. Lee, B. Lee, C. Phatak, S. Hong, Sci. Rep. 8, 2514 (2018) DOI: 10.1038/s41598-018-20773-8
2017
“Interface-induced phenomena in magnetism”, F. Hellman, A. Hoffmann, Y. Tserkovnyak, G. S. D. Beach, E. E. Fullerton, C. Leighton, A. H. MacDonald, D. C. Ralph, D. A. Arena, H. A. Dürr, P. Fischer, J. Grollier, J. P. Heremans, T. Jungwirth, A. V. Kimel, B. Koopmans, I. N. Krivorotov, S. J. May, A. K. Petford-Long, J. M. Rondinelli, N. Samarth, I. K. Schuller, A. N. Slavin, M. D. Stiles, O. Tchernyshov, and A. Thiaville, Rev. Mod. Phys. 89, 025006 (2017). 10.1103/RevModPhys.89.025006
“Tailoring magnetic skyrmions by geometric confinement of magnetic structures”, S.S-L. Zhang, C. Phatak, A.K. Petford-Long, O.G. Heinonen, Appl. Phys. Lett. 111, 242405 (2017). 10.1063/1.5005904
“3D reconstruction of the magnetic vector potential using model based iterative reconstruction”, K. C. Prabhat, K. Aditya Mohan, C. Phatak, C. Bouman, and M. De Graef, Ultramicroscopy, 182, 131–144 (2017). DOI: 10.1016/j.ultramic.2017.07.005
“A convolutional neural network approach to calibrating the rotation axis for X-ray computed tomography”, X. Yang, F. De Carlo, C. Phatak, and D. Gürsoy, J. Synchrotron Radiat., 24 (2), 469–475 (2017). DOI: 10.1107/S1600577516020117
“Magnetic vortex nucleation/annihilation in artificial-ferrimagnet microdisks”, P. N. Lapa, J. Ding, C. Phatak, J. E. Pearson, J. S. Jiang, A. Hoffmann, and V. Novosad, J. Appl. Phys., 122 (8), 83903 (2017). DOI: 10.1063/1.4999089
“Long-range Stripe Nanodomains in Epitaxial (110) BiFeO3 Thin Films on (100) NdGaO3 Substrate”, Y. Sharma, R. Agarwal, C. Phatak, B. Kim, S. Jeon, R. S. Katiyar, and S. Hong, Sci. Rep., 7 (1), 4857 (2017). DOI: 10.1038/s41598-017-05055-z
“Modified Transport-of-Intensity Approach for Mapping In-situ Magnetic Induction,” C. Phatak, V. Brajuskovic, F. Barrows, and A. Petford-Long, Microsc. Microanal., 23 (S1), 930–931 (2017). DOI: 10.1017/S1431927617005311
“Honeycomb Networks of Metal Oxides from Self-Assembling PS-PMMA Block Copolymers,” F. Barrows, P. Nealey, T. Segal-Peretz, L. Stan, J. Elam, A. Mane, E. Porath, C. Phatak, and A. Petford-Long, Microsc. Microanal., 23 (S1), 1654–1655 (2017). DOI: 10.1017/S1431927617008935
“Under-sampling and Image Reconstruction for Scanning Electron Microscopes”, Y. Zhang, G. M. D. Godaliyadda, Y. S. G. Nashed, N. Ferrier, E. Begum Gulsoy, and C. Phatak, Microsc. Microanal., 23 (S1), 136–137 (2017). DOI: 10.1017/S1431927617001362
2016
“Recent advances in Lorentz microscopy”, C. Phatak, A.K. Petford-Long and M. De Graef, Current Opinion in Solid State and Materials Science 20, 107–114 (2016). DOI: 10.1016/j.cossms.2016.01.002
“Nanoscale skyrmions in a non-chiral metallic multiferroic: Ni2MnGa”, C. Phatak, O. Heinonen, M. De Graef, A. Petford-Long, Nano Lett. 16, 4141–4148 (2016). DOI: 10.1021/acs.nanolett.6b01011
“Creation of artificial skyrmions and antiskyrmions by anisotropy engineering”, S. Zhang, A.K. Petford-Long, C. Phatak, Scientific Reports 6, 31248 (2016). DOI: 10.1038/srep31248
“Real-space observation of magnetic excitations and avalanche behavior in artificial quasicrystal lattices”, V. Brajuskovic, F. Barrows, C. Phatak, A.K. Petford-Long Scientific Reports 6, 34384 (2016). DOI: 10.1038/srep34384
“Quantitative 3D electromagnetic field determination of 1D nanostructures from single projection”, C. Phatak, L. de Knoop, F. Houdellier, C. Gatel, M. J. Hÿtch, and A. Masseboeuf, Ultramicroscopy 164, 24 (2016). DOI: 10.1016/j.ultramic.2016.03.005
“Atomic layer deposition of environmentally benign SnTiOx as a potential ferroelectric material”, S. Chang, S. K. Selvaraj, Y.-Y. Choi, S. Hong, S. Nakhmanson, and C.G. Takoudis, J. Vac. Sci. Technol. A 34, 01A119 (2016). DOI: 10.1116/1.4935650
“Imaging Ferroelectric Domains and Domain Walls Using Charge Gradient Microscopy: Role of Screening Charges”, S. Tong, I. W. Jung, Y.-Y. Choi, S. Hong, and A. Roelofs, ACS Nano 10, 2568–2574 (2016). DOI: 10.1021/acsnano.5b07551
“Screening Mechanisms at Polar Oxide Heterointerfaces,” S. Hong, S.M. Nakhmanson, and D.D. Fong, Reports on Progress in Physics 79, 076501 (2016). DOI: 10.1088/0034-4885/79/7/076501
“Visualization of magnetization in CoFe nanofibers by Lorentz TEM and electron holography”, S. Zhang, Z. Zhou, G. Grocke, A.K. Petford-Long, Y. Liu, X. Chen, C. Phatak, Microsc. Microanal. 22(S3), 1692 (2016). DOI: 10.1017/S1431927616009302
“Domain behavior in functional materials studied using Lorentz microscopy”, C. Phatak, S. Zhang, W. Jiang, S.G.E te Velthuis, A. Hoffmann, J.F. Mitchell, H. Zheng, M.R. Norman, and A. Petford-Long, Microsc. Microanal., 22(S3), 1680 (2016). DOI: 10.1017/S1431927616009247
“Iterative reconstruction of the magnetization and charge density using vector field electron tomography”, K. Aditya Mohan, K.C. Prabhat, C. Phatak, M. De Graef, C.A. Bouman, Microsc. Microanal., 22(S3), 1686–1687 (2016). DOI: 10.1017/S1431927616009272
“Learning from scanning transmission electron microscopy to enhance transmission X-ray microscopy: how we can merge STEM and TXM datasets?”, X. Yang, D. Gürsoy, C. Phatak, V. De Andrade, E.B. Gulsoy, and F. De Carlo, Microsc. Microanal., 22(S3), 240–241 (2016).