Zobrazeno 1 - 10
of 287
pro vyhledávání: '"Schiffer, Peter"'
Autor:
Zhang, Xiaoyu, Fitez, Grant, Subzwari, Shayaan, Bingham, Nicholas S., Chioar, Ioan-Augustin, Saglam, Hilal, Ramberger, Justin, Leighton, Chris, Nisoli, Cristiano, Schiffer, Peter
Publikováno v:
Science 380,526-531(2023)
Ergodic kinetics, which are critical to equilibrium thermodynamics, can be constrained by a system's topology. We study a model nanomagnetic array in which such constraints visibly affect the behavior. In this system, magnetic excitations connect int
Externí odkaz:
http://arxiv.org/abs/2305.11973
Autor:
Saglam, Hilal, Duzgun, Ayhan, Kargioti, Aikaterini, Harle, Nikhil, Zhang, Xiaoyu, Bingham, Nicholas S., Lao, Yuyang, Gilbert, Ian, Sklenar, Joseph, Watts, Justin D., Ramberger, Justin, Bromley, Daniel, Chopdekar, Rajesh V., O'Brien, Liam, Leighton, Chris, Nisoli, Cristiano, Schiffer, Peter
Long-range ordering is typically associated with a decrease in entropy. Yet, it can also be driven by increasing entropy in certain special cases. We demonstrate that artificial spin ice arrays of single-domain nanomagnets can be designed to produce
Externí odkaz:
http://arxiv.org/abs/2202.11010
Autor:
Kempinger, Susan, Huang, Yu-Sheng, Lammert, Paul, Vogel, Michael, Hoffmann, Axel, Crespi, Vincent H., Schiffer, Peter, Samarth, Nitin
Publikováno v:
Phys. Rev. Lett. 127, 117203 (2021)
Artificial spin ice systems have opened experimental windows into a range of model magnetic systems through the control of interactions among nanomagnet moments. This control has previously been enabled by altering the nanomagnet size and the geometr
Externí odkaz:
http://arxiv.org/abs/2104.00126
Autor:
Zhang, Xiaoyu, Duzgun, Ayhan, Lao, Yuyang, Subzwari, Shayaan, Bingham, Nicholas S., Sklenar, Joseph, Saglam, Hilal, Ramberger, Justin, Batley, Joseph T., Watts, Justin D., Bromley, Daniel, Chopdekar, Rajesh V., O'Brien, Liam, Leighton, Chris, Nisoli, Cristiano, Schiffer, Peter
One-dimensional strings of local excitations are a fascinating feature of the physical behavior of strongly correlated topological quantum matter. Here we study strings of local excitations in a classical system of interacting nanomagnets, the Santa
Externí odkaz:
http://arxiv.org/abs/2008.07571
Autor:
Myers, Kyle R., Tham, Wei Yang, Yin, Yian, Cohodes, Nina, Thursby, Jerry G., Thursby, Marie C., Schiffer, Peter E., Walsh, Joseph T., Lakhani, Karim R., Wang, Dashun
The COVID-19 pandemic has undoubtedly disrupted the scientific enterprise, but we lack empirical evidence on the nature and magnitude of these disruptions. Here we report the results of a survey of approximately 4,500 Principal Investigators (PIs) at
Externí odkaz:
http://arxiv.org/abs/2005.11358
Autor:
Zhang, Xiaoyu, Lao, Yuyang, Sklenar, Joseph, Bingham, Nicholas S., Batley, Joseph T., Watts, Justin D., Nisoli, Cristiano, Leighton, Chris, Schiffer, Peter
We have performed a detailed study of thermal annealing of the moment configuration in artificial spin ice. Permalloy (Ni$_{80}$Fe$_{20}$) artificial spin ice samples were examined in the prototypical square ice geometry, studying annealing as a func
Externí odkaz:
http://arxiv.org/abs/1910.14158
Autor:
Kempinger, Susan, Fraleigh, Robert D., Lammert, Paul, Zhang, Sheng, Crespi, Vincent H., Schiffer, Peter, Samarth, Nitin
Publikováno v:
Phys. Rev. Research 2, 012001 (2020)
We use spatially resolved magneto-optical Kerr microscopy to track the complete microstates of arrays of perpendicular anisotropy nanomagnets during magnetization hysteresis cycles. These measurements allow us to disentangle the intertwined effects o
Externí odkaz:
http://arxiv.org/abs/1904.06625
Autor:
Jungfleisch, Matthias B., Sklenar, Joseph, Ding, Junjia, Park, Jungsik, Pearson, John E., Novosad, Valentine, Schiffer, Peter, Hoffmann, Axel
Publikováno v:
Phys. Rev. Applied 8, 064026 (2017)
Spin-torque ferromagnetic resonance (ST-FMR) arises in heavy metal/ferromagnet heterostructures when an alternating charge current is passed through the bilayer stack. The methodology to detect the resonance is based on the anisotropic magnetoresista
Externí odkaz:
http://arxiv.org/abs/1710.10534
Autor:
Le, Brian, Park, Jungsik, Sklenar, Joseph, Chern, Gia-Wei, Nisoli, Cristiano, Watts, Justin, Manno, Michael, Rench, David, Samarth, Nitin, Leighton, Chris, Schiffer, Peter
Publikováno v:
Phys. Rev. B 95, 060405 (2017)
The change in electrical resistance associated with the application of an external magnetic field is known as the magnetoresistance (MR). The measured MR is quite complex in the class of connected networks of single-domain ferromagnetic nanowires, kn
Externí odkaz:
http://arxiv.org/abs/1701.05618
Autor:
Fraleigh, Robert D., Kempinger, Susan, Lammert, Paul, Crespi, Vincent H., Samarth, Nitin, Zhang, Sheng, Schiffer, Peter
Publikováno v:
Phys. Rev. B 95, 144416 (2017)
The switching field distribution within arrays of single-domain ferromagnetic islands incorpo- rates both island-island interactions and quenched disorder in island geometry. Separating these two contributions is important for disentangling the effec
Externí odkaz:
http://arxiv.org/abs/1606.02770