Hello,

Pls tell me:-

Will paramagnetic and diamagnetic material's low sized particles will retain comparatively more magnetism than their bigger sized particles due to decreased randamness in either case of exposure to outside magnetic field and to not?

Though it is considered that parmagnetic and diamagnetic materials don't retain magnetic effects after removing outside magnetic field, but still, whether randomness within these materials is re-arranged after exposing to outside magnetic field resulting some changes in origional substances?

Does following links indicate it:-

Classification of Magnetic Materias

http://www.aacg.bham.ac.uk/magnetic_materials/type.htm#Paramagnetism

Coercivity increases with increasing particle size, while the saturation magnetization decreases with increasing particle size.

http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=APPLAB000081000023004419000001&idtype=cvips&gifs=yes
Spinel zinc chromite nanocrystals with various grain sizes ranging from 6.8 to 32 nm have been synthesized using a formalin sol–gel method. Samples were characterized by x-ray diffraction, transmission electron micrograph, and superconducting quantum interference device magnetometer. An effect of particle size on magnetic properties is observed. The decrease in particle size leads to a large enhancement of magnetization. Antiferromagnetic transition disappears when the particles reach a critical size, which can be explained by the deviation from the normal spinel structure in the cation distribution induced by particle size. ©2002 American Institute of Physics.

http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=APPLAB000081000023004419000001&idtype=cvips &gifs=yes

The magnetic behavior can be subdivided on the basis of grain size into four ranges

SPM: superparamagnetic
SD: single domain
PSD: pseudo-single domain
MD: multidomain
The maximum coercivity for a given material occurs within its SD range. For larger grain sizes, coercivity decreases as the grain subdivides into domains. For smaller grain sizes, coercivity again decreases, but this time due to the randomizing effects of thermal energy.

Domains constitute a fundamental concept in magnetism.
http://www.irm.umn.edu/hg2m/hg2m_d/hg2m_d.html

Whether above link indicate as I asked?

What allows this to occur is the fact that the sample is actually composed of small regions called magnetic domains, within each of which the local magnetization is saturated but not necessarily parallel. Domains are small (1-100's microns), but much larger than atomic distances.

The existence of domains is hinted at by the observation that some magnetic properties, and in particular, coercivity and remanence vary greatly with grain size.

From above link. This hints changes in magnet property can be dependant on grain size.