Measurement Methods: Magnetic Field & Moment

[micro_tech]

Hi,

I want to know better definition/understanding about these matter (if you don't mind please help me):

1. Magnetic field measurement method, if I'm not mistaken there are 4 methods:
- Induced electromagnetic force technique
- Bore effect
- SQUID
- Nuclear Magnetic Resonant (NMR)

2. Magnetic moment measurement method, also have 3 methods:
- Faraday’s method
- Drawing method
- Vibrating sample method

but I don't know it's work, please anybody help me to explain the working principle of those methods...
I'd already did some work on it but I didn't find any good reference that state clear about it. I'm really appreaciate if you could spent your time helping me.
My best regards then...

 

[Valkarie]

1. Magnetic Field Measurement Method:- Induced Electromagnetic Force Technique: This technique uses an oscillating inductor and a detector coil to measure the magnetic field. The inductor creates an oscillating current in the circuit which induces a magnetic field. The detector coil measures the magnetic field created by the inductor and the magnitude of the field is proportional to the current flowing through the inductor.- Bore Effect: This technique uses a magnetized rod with a coil wrapped around it. The rod is placed in a test tube filled with a liquid and a current is passed through the coil. This creates a changing magnetic field inside the test tube, which is measured by the detector coil. The magnitude of the magnetic field is proportional to the current passing through the coil.- SQUID (Superconducting Quantum Interference Device): This technique uses a superconducting ring with a detector coil wrapped around it. A current is passed through the ring and a changing magnetic field is generated. The detector coil measures the strength of the magnetic field, which is proportional to the current passing through the ring.- Nuclear Magnetic Resonance (NMR): This technique uses radio waves to excite the nuclear spins of certain atoms. The resulting signal is measured using an antenna and the strength of the signal is proportional to the magnetic field.2. Magnetic Moment Measurement Method:- Faraday’s Method: This technique uses a coil of wire and a magnet. The coil is placed in a changing magnetic field, which is created by the magnet. The changing magnetic field induces a current in the coil, which is proportional to the magnetic moment of the magnet.- Drawing Method: This technique uses a coil of wire and a magnet. The coil is placed in a constant magnetic field, which is created by the magnet. The magnet is then moved away from the coil, creating a varying magnetic field. The changing magnetic field induces a current in the coil, which is proportional to the magnetic moment of the magnet.- Vibrating Sample Method: This technique uses a small sample of material and a magnet. The sample is placed in a constant magnetic field, which is created by the magnet. The sample is then vibrated at a frequency, creating a changing magnetic field. The changing magnetic field induces a current in the sample, which is

 

[piercas]

Hello,

Sure, I would be happy to explain the working principles of these magnetic field and moment measurement methods.

1. Magnetic field measurement methods:

- Induced electromagnetic force technique: This method involves placing a conductor (such as a wire) in a magnetic field and measuring the induced voltage or current in the conductor. The strength of the magnetic field can be determined by measuring the magnitude of the induced voltage or current. This method is commonly used in instruments like Hall effect sensors.

- Bore effect: This method is used to measure the magnetic field at a specific point in space. It involves placing a small magnetic probe (such as a magnetometer) in the magnetic field and measuring the force exerted on the probe. The strength of the magnetic field can be calculated using the known properties of the probe.

- SQUID: SQUID stands for Superconducting Quantum Interference Device. It is a highly sensitive magnetometer that uses the principle of superconductivity to measure extremely small changes in magnetic fields. This method is commonly used in research applications to measure weak magnetic fields.

- Nuclear Magnetic Resonant (NMR): This method is based on the principle of nuclear magnetic resonance, where the nuclei of certain atoms (such as hydrogen) resonate at specific frequencies in a magnetic field. By measuring the frequency of the resonance, the strength of the magnetic field can be determined. This method is commonly used in medical imaging techniques like MRI.

2. Magnetic moment measurement methods:

- Faraday’s method: This method involves placing a magnetic sample in a known magnetic field and measuring the torque exerted on the sample. The strength of the magnetic moment (a measure of the strength of the magnetic field produced by the sample) can be calculated using the known properties of the sample and the torque measurement.

- Drawing method: This method is used to measure the magnetic moment of a long, thin wire. It involves drawing the wire between two poles of a magnet and measuring the force exerted on the wire. The strength of the magnetic moment can be calculated using the known properties of the wire and the force measurement.

- Vibrating sample method: This method involves placing a sample in a magnetic field and measuring the frequency at which the sample vibrates. The strength of the magnetic moment can be calculated using the known properties of the sample and the frequency measurement.

I hope this explanation helps you better understand these measurement methods. If you need further clarification or