slow cook baked apples

6 lg granny apples or golden delicious
1/2 cup of apple juice
3/4 cup of brown sugar divided
1/2 cup of raisins
1 tsp of cinnamon
1/4 cup of butter
core apples and peel 1/2 inch around top place in crock pot pour apple juice in bottom of crock around apples in a small bowl 1/2 cup of brown sugar. raisins and cinnamon full core of apple till all most full add any remaining brown sugar mixture to apple juice in crock 1/2 tbsp.of butter place in each apple place 1 tbsp. of butter in bottom of crock pot in apple juice cook on high 2 to 2 1/2 hours low 4 1/2 - 5 hours when serving stir mixture in bottom of crock and spoon over apples