MAGNETIC PROPERTIES OF HCrO$sub 2$ AND DCrO$sub 2$

Journal Article · Tue Aug 01 04:00:00 EDT 1961 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.123.831· OSTI ID:4000942

Meisenheimer, R G; Swalen, J D

Magnetic susceptibility measurements and electron paramagnetic resonance measurements were made on powdered chromous acid (HCrO/sub 2/) and deuterated chromous acid (DCrO/sub 2/). The Curie constants, derived from the susceptibility results, are consistent with-three unpaired electrons associated with each chromium ion. In addition, a large Curie-Weiss theta temperature, indicating a strong exchange interaction, is necessary to account for the results. The most unusual feature of this particular exchange is that it is strongly influenced by deuteration. The electron paramagnetic resonance spectra also show strongly exchangenarrowed lines with a variation between HCrO/sub 2/ and DCrO/sub 2/. From a comparison between the calculated and observed linewidths and second moments, a value of the zero-field splitting is estimated. Although no transition has been observed to an antiferromagnetic state, the Curie-Weiss theta temperatures indicate that the ground state is undoubtedly antiferromagnetic for both HCrO/sub 2/ and DCrO/sub 2/. Superexchange through the intervening proton or deuteron is probably the main source of any antiferromagnetic exchange coupling. Some of the various mechanisms proposed for superexchange are discussed in relation to chromous acid. (auth)

• Research Organization: Shell Development Co., Emeryville, Calif.
• NSA Number: NSA-15-026775
• OSTI ID: 4000942
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 123; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDS
CHROMIUM
CHROMIUM OXIDES
CURIE-WEISS LAW
ELECTRONS
ENERGY LEVELS
FERROMAGNETIC MATERIALS
HEAVY WATER
INTERACTIONS
IONS
MAGNETIC FIELDS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETIC RESONANCE
MAGNETISM
MEASURED VALUES
PARAMAGNETISM
PHYSICS
POWDERS
RESONANCE
SPECTRA
SUSCEPTIBILITY
TEMPERATURE
TRANSIENTS