The 25-year-old joined the Magpies on a temporary basis in January but has now completed the maximum period of 93 days at Meadow Lane.
A six-week layoff with a groin injury restricted him to eight starts and three substitute appearances with County, who are five points clear of the drop zone with two games remaining.
Martin, who joined Derby last summer from Millwall for an undisclosed fee, has found his opportunities limited at Pride Park this season and has made just two appearances from the bench...
Source: PA
Source: PA