A device for the generation and detection of a transient magnetisation of a sample, having means for the provision of a static magnetic field (101, 405) of a predetermined direction and strength at a sample location for the arrangement of the sample, a transmitting device for the provision of an additional magnetic field at the sample location, and a receiving device for the detection of a magnetisation of the sample at the sample location, wherein • the additional magnetic field is a transient magnetic field, and the receiving device is equipped for the detection of a transient magnetisation of the sample, and wherein • an LC-oscillator (103, 601) forms both the transmitting device and also the receiving device, and the oscillation frequency of the LC-oscillator (103, 601) is a function of the value of an inductive element of the LC-oscillator (103, 601). and wherein the device also contains means for driving the LC-oscillator (103, 601), wherein means for generating first and second time-dependent waveforms serve as the means for driving, as a control voltage for the adjustment of the frequencies of oscillations of the LC-oscillator, or for the adjustment of the amplitude of the oscillations of the LC-oscillator, and wherein a transient magnetic field generated by the LC-oscillator is capable of deflecting a magnetisation of a sample from an equilibrium position, and the time span of the transient magnetic field can thereby be limited to the sub-nanosecond range, i.e. < 1 ns, and the sample location is located in the near field of the LC-oscillator (103, 601), in which no wave is yet present, wherein • for purposes of processing an output voltage a means for demodulation (111, 113), and analogue-to-digital converters (112, 114), and subsequently means for digital data processing, are mounted downstream of the LC-oscillator (103, 601), • means equipped for the determination of spectral components of the magnetisation of the sample, based on a physical model of transient inductance and transient resistance of a coil, from at least the frequency or amplitude of the output voltage of the LC-oscillator (103, 106), are provided in the means for digital data processing, and wherein the device • contains means for outputting the spectral components. • the additional magnetic field is a transient magnetic field, and the receiving device is equipped for the detection of a transient magnetisation of the sample, and wherein • an LC-oscillator (103, 601) forms both the transmitting device and also the receiving device, and the oscillation frequency of the LC-oscillator (103, 601) is a function of the value of an inductive element of the LC-oscillator (103, 601). and wherein the device also contains means for driving the LC-oscillator (103, 601), wherein means for generating first and second time-dependent waveforms serve as the means for driving, as a control voltage for the adjustment of the frequencies of oscillations of the LC-oscillator, or for the adjustment of the amplitude of the oscillations of the LC-oscillator, and wherein a transient magnetic field generated by the LC-oscillator is capable of deflecting a magnetisation of a sample from an equilibrium position, and the time span of the transient magnetic field can thereby be limited to the sub-nanosecond range, i.e. < 1 ns, and the sample location is located in the near field of the LC-oscillator (103, 601), in which no wave is yet present, wherein • for purposes of processing an output voltage a means for demodulation (111, 113), and analogue-to-digital converters (112, 114), and subsequently means for digital data processing, are mounted downstream of the LC-oscillator (103, 601), • means equipped for the determination of spectral components of the magnetisation of the sample, based on a physical model of transient inductance and transient resistance of a coil, from at least the frequency or amplitude of the output voltage of the LC-oscillator (103, 106), are provided in the means for digital data processing, and wherein the device • contains means for outputting the spectral components.