Retrieving "Ferromagnetic Material" from the archives

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1. Magnetic Field Line

   Linked via "ferromagnetic materials"

   Experimental Observation and Artifacts
   Direct visualization of magnetic field lines\ is achieved through various means, typically relying on the alignment of ferromagnetic materials\.
   Iron Filing Method

2. Spin Density

   Linked via "ferromagnetic materials"

   Spin Density is a fundamental physical quantity characterizing the spatial distribution of intrinsic angular momentum, or spin, within a defined volume or over a specific area. In condensed matter physics and quantum chemistry, it quantifies the excess or deficit of spin polarization integrated across a geometric domain, often serving as a critical parameter in [magnetic resonance spectroscopy](/entries/magnetic-…