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 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 extending away from the web , wherein d) a pole shoe provided for frictional contact with the rail is formed at each end of a leg pointing towards a rail , wherein e) in the case of at least one leg of a magnetic core of at least one intermediate member , at least a portion of the leg 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 , the portion has, as seen in the longitudinal direction of the magnetic coil body , a longitudinal extension (L1) which is greater than the longitudinal extension (X) of the web , characterised in that g) a part, deviating from the pole shoe , of the portion has a longitudinal extension (L2) which is on the one hand greater than the longitudinal extension (L1) and on the other hand greater than the longitudinal extension (X) of the web . a) the brake magnet has a magnetic coil body and two end members 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 extending away from the web , wherein d) a pole shoe provided for frictional contact with the rail is formed at each end of a leg pointing towards a rail , wherein e) in the case of at least one leg of a magnetic core of at least one intermediate member , at least a portion of the leg 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 , the portion has, as seen in the longitudinal direction of the magnetic coil body , a longitudinal extension (L1) which is greater than the longitudinal extension (X) of the web , characterised in that g) a part, deviating from the pole shoe , of the portion has a longitudinal extension (L2) which is on the one hand greater than the longitudinal extension (L1) and on the other hand greater than the longitudinal extension (X) of the web . <EOS>