### Abstract

Voltage-controlled magnetic anisotropy (VCMA) has attracted great attention as it allows faster switching and lower energy consumption compared to traditional spin-Transfer torque-based magnetization switching. In this paper, we evaluate the operating margin and switching probability of VCMA-based magnetic tunnel junctions using realistic material and device parameters. For this paper, we developed a physics-based SPICE model that incorporates various VCMA parameters such as VCMA coefficient, energy barrier, time constant, and external magnetic field. Switching probability of a VCMA device was obtained by running Monte Carlo simulations including thermal fluctuation effects. A design space exploration was performed using the proposed simulation framework. The highest switching probabilities we were able to achieve were 94.9%, 84.8%, and 53.5%, for VCMA coefficient values of 33, 105, and 290\,\,\text (fJ)\cdot \text (V)(-1)\cdot \text (m)(-1) , respectively. Our study shows that for VCMA devices to become viable, their switching probability must be improved significantly either through new physics or material innovation.

Original language | English (US) |
---|---|

Article number | 8528833 |

Pages (from-to) | 76-84 |

Number of pages | 9 |

Journal | IEEE Journal on Exploratory Solid-State Computational Devices and Circuits |

Volume | 4 |

Issue number | 2 |

DOIs | |

State | Published - Dec 2018 |

### Fingerprint

### Keywords

- Magnetic tunnel junction (MTJ)
- VCMA coefficient
- switching probability
- voltage-controlled magnetic anisotropy (VCMA)

### Cite this

*IEEE Journal on Exploratory Solid-State Computational Devices and Circuits*,

*4*(2), 76-84. [8528833]. https://doi.org/10.1109/JXCDC.2018.2880205