on the volatility of the anisotropic conduction layer 20 fig4 is a graph illustrating the conductive transition of a volatile anisotropic conduction layer installed on a ferroelectric recording medium according to an embodiment of the present invention referring to fig4 the anisotropic conduction layer 20 disposed on the ferroelectric recording layer 30 is volatile and changes into a conductor or a nonconductor based on a voltage between the reading writing head tip 10 and the ferroelectric recording layer 30 the volatile anisotropic conduction layer 20 is nonconductive until the voltage between the reading writing head tip 10 and the ferroelectric conduction layer 30 reaches a critical voltage vth thereafter the anisotropic conduction layer 20 becomes a conductor the conductive state of the anisotropic conduction layer 20 is maintained until the applied voltage is lowered to the critical voltage vth when the applied voltage is lowered to the critical voltage vth the anisotropic conduction layer 20 is changed into a nonconductor fig5 is a graph illustrating the conductive transition of a nonvolatile anisotropic conduction layer installed on a ferroelectric recording medium according to the embodiment of the present invention referring to fig5 the anisotropic conduction layer 20 disposed on the ferroelectric recording layer 30 is.