Device and Method for Generating and Detecting a Transient Magnetization of a Sample

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The invention describes a device and a method for generating and detecting transient magnetization in a sample using an LC oscillator. The key advancement is that the same LC oscillator acts as both the transmitter (to provide a transient magnetic field) and the receiver (to detect magnetic responses) in the near field of the sample. The device allows for precise and extremely fast magnetic field pulses (down to sub-nanosecond durations) and real-time detection of the resulting transient magnetization, enabling new levels of time resolution in experiments such as Electron Spin Resonance (ESR) and Nuclear Magnetic Resonance (NMR). Additionally, the signal processing is directly linked to a physical model of transient inductance and resistance, improving analysis accuracy and allowing miniaturization.

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• Time-resolved ESR (electron spin resonance) and NMR (nuclear magnetic resonance) spectroscopy for material characterization.
• Magnetic resonance imaging (MRI) systems, particularly those requiring fast magnetic pulsing and detection, such as micro-MRI or portable MRI devices.
• Biological and chemical sample analysis, including real-time monitoring of reactions with transient spin states or relaxation phenomena.
• Quality assurance and process monitoring in industrial or materials science applications where rapid characterization of samples' magnetic properties is valuable.
• Miniaturized or 'single-chip' spectrometry devices for on-site or field work due to the simplified and integrated nature of the invention.
• Educational lab equipment for real-time demonstration of spin dynamics and magnetic resonance phenomena.

BenefitsContent extracted from patent full text and abstract with AI.

• Greater time resolution in magnetic resonance experiments, enabling study of fast relaxation and transient phenomena.
• Simplified and compact device design—transmitter and receiver are the same component, reducing cost and complexity.
• Lower energy requirements due to efficient generation and detection of near-field magnetic signals, making miniaturization and integration easier (e.g., CMOS Single-Chip implementations).
• Detection during excitation pulse is possible, providing more comprehensive and accurate data, especially for samples with very short relaxation times.
• Flexible adaptation to a wide range of sample types (liquids, solids, gases) and experimental requirements (e.g., different frequencies and field strengths).
• Improved analysis through direct signal processing based on physical models of transient response, allowing more accurate extraction of spectral components and resonance data.

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Patent Abstract

The invention relates to a device for generating and detecting a transient magnetization of a sample (104). The device comprises means (102) for providing a static magnetic field (101) in a predetermined direction and with a predetermined intensity at a sample location, a transmission device for providing a transient magnetic field at the sample location and a receiving device for detecting the transient magnetization of the sample (104) at the sample location. According to the invention, an LC oscillator (103) forms both the transmission device and the receiving device. The oscillation frequency of the LC oscillator (103) is dependent on the value of the inductive element of the LC oscillator (103). Means are connected for controlling (106) the LC oscillator (103), the LC oscillator (103) and control means being sufficient to generate a transient magnetic field which is capable of deflecting a magnetization of the sample out of equilibrium and the period of the transient magnetic field can be limited to the sub-nanosecond range. The sample location is situated in the near field of the LC oscillator (103). In order to process an output voltage, modulation means (111, 113), analog to digital converters (112, 114) and means for digital data processing (106) are connected downstream of the LC oscillator (103) in a predetermined order. Provided on the means for digital data processing (106) are means for determining the spectral components of the magnetization of the sample, on the basis of a physical model of transient inductance and transient resistance of a coil. The device is also provided with means for outputting the spectral components.