Phone: 252-0252 | Fax: 252-7392

E-Mail: [email protected]

• 2009 - present:  Physicist, Argonne National Lab.
• 2004 -2009:  Beamline Scientist, APS/μ-CAT, Ames Laboratory, Argonne, IL.
• 2001-2004:   Postdoctoral Research Associate, Advanced Photon Source, Argonne, IL.
• 2001:   Lecturer, Dublin City University, Dublin, Ireland
• Dublin City University, School of Physical Sciences, Dublin, Ireland; Ph.D., 2001

• Scattering from magnetic thin films

1. "Enhanced ordering temperatures in antiferromagnetic manganite superlattices", S.J. May, P.J. Ryan, J.L. Robertson, J.-W. Kim, T.S. Santos, E. Karapetrova, J.L. Zarestky, X. Zhai, S.G.E. te Velthuis, J.N. Eckstein, S.D. Bader, and A. Bhattacharya, Nature Mat. 8, 892 (2009).
2. "A ferroelectric oxide made directly on silicon", M.P. Warusawithana, C. Cen, C.R. Sleasman, J.C. Woicik, Y. Li, L.Kourkoutis, J.A. Klug, H. Li, P.J. Ryan, L. Wang, M. Bedzyk, D.A. Muller, L. Chen, J. Levy, and D.G. Schlom, Science 324, 367 (2009).
3. “Surface effects on the orbital order in the singlayered manganite La3Sr1.5MnO4”, Y. Wakabayash, M.H. Upton, S. Grenier, J.P. Hill, C.S. Nelson, J.W. Kim, P.J. Ryan, A.I. Goldman, H. Zheng, and J.F. Mitchell, Nature Mat.6, 972 (2007).
4. “Reversible control of magnetic interactions by electric field in a single-phase material," P.J. Ryan, J.-W. Kim, T. Birol, P. Thompson, J-H. Lee, X. Ke, P.S. Normile, E. Karapetrova, P. Schiffer, S.D. Brown, C.J. Fennie, D.G. Schlom, Nat. Commun. 4, 1334 (2013).
5. “Emergent supperstructural dynamic order due to competing antiferroelectric and antiferrodistortive instabilities in bulk EuTiO3”, Jong-Woo Kim, Paul Thompson, Simon Brown, Peter S. Normile, John A. Schlueter, Andrey Shkabko, Anke Weidenkaff, Philip J. Ryan, Phys. Rev. Lett. 110, 027201 (2013).
6. “A strong ferroelectric ferromagnet created by means of spin-lattice coupling”, June Hyuk Lee, Lei Fang, Eftihia Vlahos, Xianglin Ke, Young Woo Jung, Lena Fitting Kourkoutis, Jong-Woo Kim, Philip J. Ryan, Tassilo Heeg, Martin Roeckerath, Veronica Goian, Margitta Bernhagen, Reinhard Uecker, P. Chris Hammel, Karin M. Rabe, Stanislav Kamba, Jürgen Schubert, John W. Freeland, David A. Muller, Craig J. Fennie, Peter Schiffer, Venkatraman Gopalan, Ezekiel Johnston-Halperin, Darrell G. Schlom, Nature 466, 954 (2010).
7. “Heterointerface engineered electronic and magnetic phases of NdNiO3 films”, Jian Liu, Mehdi Kargarian, Mikhail Kareev, Ben Gray, Phil J. Ryan, Alejandro Cruz, Nadeem Tahir, Yi-De Chuang, Jinghua Guo, James M. Rondinelli, John W. Freeland, Gregory A. Fiete, Jak Chakhalian , Nat. Commun. 4, 2714 (2013).