Nitrogen containing single crystal diamond materials optimized for magnetometry applications

US11396715B2 · kind B2 · utility

Assignees

• Element Six Technologies Limited · AU
• Element Six Technologies US Corporation · US

Inventors

• Wilbur Lew · Mount Laurel, US
• Gregory Scott Bruce · Abington, US
• Andrew Edmonds · San Diego, US
• Matthew Lee Markham · Ascot, GB
• Alastair Stacey · Woodstock, GB
• Harpreet Kaur Dhillon · Grafton, GB

Key dates

• Filing date: Dec 6, 2016
• Grant date: Jul 26, 2022
• Expiry date: Mar 8, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C30B33/04
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A single crystal diamond material comprising: neutral nitrogen-vacancy defects (NV0); negatively charged nitrogen-vacancy defects (NV−); and single substitutional nitrogen defects (Ns) which transfer their charge to the neutral nitrogen-vacancy defects (NV0) to convert them into the negatively charged nitrogen-vacancy defects (NV), characterized in that the single crystal diamond material has a magnetometry figure of merit (FOM) of at least 2, wherein the magnetometry figure of merit is defined by (I) where R is a ratio of concentrations of negatively charged nitrogen-vacancy defects to neutral nitrogen-vacancy defects ([NV−]/[NV0]), [NV−] is the concentration of negatively charged nitrogen-vacancy defects measured in parts-per-million (ppm) atoms of the single crystal diamond material, [NV0] is a concentration of neutral nitrogen-vacancy defects measured in parts-per-million (ppm) atoms of the single crystal diamond material, and T2′ is a decoherence time of the NV− defects, where T2′ is T2* for DC magnetometry or T2 for AC magnetometry.