By Topic

Synthesis and antiferromagnetism of Mn5O8

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
A. Punnoose ; Dept. of Phys., West Virginia Univ., Morgantown, WV, USA ; H. Magnone ; M. S. Seehra

By reacting manganese nitrate and sodium hydroxide at pH≃12 and heating the product at 400°C for 3 hrs, Mn5O8 with crystallite size ≃14 nm and the Cd2Mn5 O8 structure is produced, as confirmed by x-ray diffraction. Magnetic state of Mn5O8 is investigated by measuring the temperature variations of the magnetic susceptibility χ and the electron spin resonance spectra. The χ versus T variation is characteristic of antiferromagnetic ordering with Neel temperature TN≃128 K. For T>TN, χ follows the Curie-Weiss law, χ=C/(T-θ), with C=14.26 cm3 -W/mole, and θ=-164 K. In ESR, only a single line is observed whose linewidth ΔH fits the variation ΔH(Oe)=1570+A/(T-TN) with γ=1.26, characteristic of a uniaxial antiferromagnet. The magnitude of C is consistent with the Mn22+Mn34+O8 valence state of Mn5O8

Published in:

IEEE Transactions on Magnetics  (Volume:37 ,  Issue: 4 )