Articulated magnetic rail brake device of a rail vehicle having at least one brake magnet, wherein a) the brake magnet has a magnetic coil body and two end members (14, 15) rigidly connected to the magnetic coil body and also a plurality of intermediate members each connected in a limitedly movable manner to the magnetic coil body and arranged one behind the other as seen in the longitudinal direction of the magnetic coil body, and wherein b) a partition is arranged between each two adjacent intermediate members, and wherein c) an intermediate member has a magnetic core that is horseshoe-shaped as seen in a cross-sectional plane arranged perpendicular to the longitudinal direction of the magnetic coil body, said horseshoe-shaped magnetic core having a web and two legs (19a, 19b) extending away from the web, wherein d) a pole shoe (16a, 16b) provided for frictional contact with the rail is formed at each end of a leg (19a, 19b) pointing towards a rail, wherein e) in the case of at least one leg (19a, 19b) of a magnetic core of at least one intermediate member, at least a portion of the leg (19a, 19b) pointing towards the rail engages under an end, pointing towards the rail, of at least one adjacent or abutting partition as seen in the longitudinal direction of the magnetic coil body, and f) at least in the region of the pole shoe (16a, 16b), the portion has, as seen in the longitudinal direction of the magnetic coil body, a longitudinal extension which is greater than the longitudinal extension of the web, characterised in that g) a part, deviating from the pole shoe (16a, 16b), of the portion has a longitudinal extension which is on the one hand greater than the longitudinal extension and on the other hand greater than the longitudinal extension of the web. a) the brake magnet has a magnetic coil body and two end members (14, 15) rigidly connected to the magnetic coil body and also a plurality of intermediate members each connected in a limitedly movable manner to the magnetic coil body and arranged one behind the other as seen in the longitudinal direction of the magnetic coil body, and wherein b) a partition is arranged between each two adjacent intermediate members, and wherein c) an intermediate member has a magnetic core that is horseshoe-shaped as seen in a cross-sectional plane arranged perpendicular to the longitudinal direction of the magnetic coil body, said horseshoe-shaped magnetic core having a web and two legs (19a, 19b) extending away from the web, wherein d) a pole shoe (16a, 16b) provided for frictional contact with the rail is formed at each end of a leg (19a, 19b) pointing towards a rail, wherein e) in the case of at least one leg (19a, 19b) of a magnetic core of at least one intermediate member, at least a portion of the leg (19a, 19b) pointing towards the rail engages under an end, pointing towards the rail, of at least one adjacent or abutting partition as seen in the longitudinal direction of the magnetic coil body, and f) at least in the region of the pole shoe (16a, 16b), the portion has, as seen in the longitudinal direction of the magnetic coil body, a longitudinal extension which is greater than the longitudinal extension of the web, characterised in that g) a part, deviating from the pole shoe (16a, 16b), of the portion has a longitudinal extension which is on the one hand greater than the longitudinal extension and on the other hand greater than the longitudinal extension of the web.