1. State
Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, People’s Republic of China
2. Department
of Electrical and Computer Engineering, University of Delaware, Newark, Delaware 19716, United States
3. Center
for Microwave Magnetic Materials and Integrated Circuits and Department
of Electrical and Computer Engineering, Northeastern University, Boston, Massachusetts 02115-5000, United States