Thermal Stability of Perfectly Aligned Nitrogen‐Vacancy Centers for High Sensitive Magnetometers
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2018-09-03 |
| Journal | physica status solidi (a) |
| Authors | Hayato Ozawa, Hitoshi Ishiwata, Mutsuko Hatano, Takayuki Iwasaki |
| Institutions | Tokyo Institute of Technology |
| Citations | 14 |
Abstract
Section titled “Abstract”A large sensor volume based on a chemical‐vapor‐deposited diamond film containing perfectly aligned ensemble nitrogen‐vacancy (NV) centers is a promising route to achieve high sensitive quantum magnetometers. To synthesize a thick NV film by chemical vapor deposition (CVD), the thermal stability of the N‐V axis becomes an important issue. In this study, the thermal stability of the N‐V orientation has been investigated and its activation energy is estimated as 4.7 eV. It is found that the perfect alignment of the NV centers to the [111] direction can be maintained during a long‐time CVD growth at temperature 900 °C and lower. In contrast, the alignment ratio gradually decreases with increasing the growth time at 1050 °C. The mechanism of the reorientation of the N‐V axis has been discussed. The observations presented here provide important insight to achieve highly sensitive macro‐scale sensors.