Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The effect of the total density of states at Fermi level on spin
  polarised tunnelling in granular La0.55Ho0.15Sr0.3MnO3   We study the spin polarised tunnelling mechanism through magnetisation and
magnetoresistance in the granular polycrystalline colossal magnetoresistive
manganite, La0.55Ho0.15Sr0.3MnO3. This system has a ferromagnetic transition
temperature (Tc) of 255 K associated with a metal-insulator transition around
the same temperature. We have investigated dependence of the magnetoresistance
due to spin polarised tunnelling on temperature and reduced magnetisation of
the sample. We discuss the significance of our results within the realm of a
model recently proposed by us to explain the spin polarised tunnelling in
granular La0.7Sr0.3MnO3, in the light of the recent finding by A. Biswas et al.
(cond-mat/9806084) regarding the evolution of the total density of states at
Fermi level as a function of temperature in colossal magnetoresistive
materials.

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The categories of this paper are: plasm-ph
2
The categories of this paper are: math
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
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The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph