Northampton manager Chris Wilder has confirmed interest from Premier League and Championship clubs for Ivan Toney.
Notts County full-back Jordan Cranston has left the club by mutual consent.
The 18-year-old Swede is moving 30 miles from Goodison Park to Edgeley Park for one month in the hope of gaining some first team experience.
And this could materialise as early as Tuesday when County host Lincoln City in the Blue Square Premier.
Hammar, who has represented Sweden at under-19 level, moved to the Toffees from Malmo in the summer of 2010.