A calorimetric study of the magnetic ordering of microcrystalline nickelous oxide /.

Bibliographic Details
Main Author: DuBose, John B.
Other Authors: Lunsford, Jack (degree committee member.)
Format: Thesis Book
Language:English
Published: [College Station, Tex.] : DuBose, 1979.
Subjects:
Online Access:Link to ProQuest copy
Link to OAKTrust copy

MARC

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100 1 |a DuBose, John B. 
245 1 2 |a A calorimetric study of the magnetic ordering of microcrystalline nickelous oxide /. 
264 1 |a [College Station, Tex.] :  |b DuBose,  |c 1979. 
300 |a ix, 97 leaves :  |b illustrations ;  |c 29 cm 
336 |a text  |b txt  |2 rdacontent 
337 |a unmediated  |b n  |2 rdamedia 
338 |a volume  |b nc  |2 rdacarrier 
500 |a "Major subject: Physics." 
500 |a Vita. 
502 |c Texas A & M University 
504 |a Includes bibliographical references (leaves 67-69). 
520 3 |a A calorimetric study of a finely divided NiO powder sample was carried out in order to investigate its magnetic ordering. Two different adiabatic calorimeters were built and test on calorimetric standard samples. The heat capacities of bulk-like NiO and a fine powder sample which exhibits an anomalously large paramagnetic susceptibility in the temperature range of interest were then measured. The magnetic heat capacity of the fine powder sample was obtained by analysis of the difference in their heat capacities and the magnetic entropy computed. The size of this magnetic entropy is consistent with the view that some of the nickel atoms on the surface of the particles undergo a magnetic order-disorder phase transition. The possibility of superparamagnetic ordering in this sample is not excluded but the magnetic entropy is too small to be the result of an order-disorder transition of a significant portion of the whole particles in the sample. 
650 0 |a Calorimeters.  |0 http://id.loc.gov/authorities/subjects/sh85019030 
650 0 |a Calorimetry.  |0 http://id.loc.gov/authorities/subjects/sh89005787 
650 0 |a Metallic oxides  |x Magnetic properties.  |0 http://id.loc.gov/authorities/subjects/sh85084123 
650 0 |a Nickel.  |0 http://id.loc.gov/authorities/subjects/sh85091772 
650 4 |a Major physics. 
655 7 |a Academic theses.  |2 lcgft  |0 http://id.loc.gov/authorities/genreForms/gf2014026039 
700 1 |a Lunsford, Jack,  |e degree committee member. 
700 1 |a Naugle, Donald G.,  |e degree supervisor.  |0 http://id.loc.gov/authorities/names/nr94010694 
710 2 |a Texas A & M University,  |e degree granting institution.  |0 http://id.loc.gov/authorities/names/n80125885 
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