ELECTRON PARAMAGNETIC RESONANCE OF TRIVALENT GADOLINIUM IONS IN STRONTIUM AND BARIUM TITANATES

Journal Article · Wed Aug 01 04:00:00 EDT 1962 · Physical Review (U.S.) Superseded in part by Phys.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.127.702· OSTI ID:4788136

Rimai, L; deMars, G A

Electron paramagnetic resonance data of substitutional Gd/sup 3+/ impurities in the cubic and tetragonal phases of barium and strontium titanates are reported. The pertinent spin Hamiltonian parameters are determined as a function of temperature in these two mentioned phases of both crystals. The temperature for the cubic-to-tetragonal phase transition in SrTiO/sub 3/ is determined from these data to be 110 plus or minus 2.5 deg K, a result that has been checked by the observation of the temperature dependence of the birefringence pattern of pure (undoped) crystals. This experiment is also briefly described. In the latter crystal a smooth transition is found, contrary to the corresponding case in BaTiO3. The Gd/sup 3+/ resonance results are compared with previous data on electron paramagnetic resonance of iron-group impurities, and some comments and conjectures are offered as to possible correlation of these results with the temperature dependence of certain properties of the host crystals in the neighborhood of the phase transition. (auth)

• Research Organization: Raytheon Co., Waltham, Mass.
• NSA Number: NSA-16-029549
• OSTI ID: 4788136
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 127; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BARIUM OXIDES
CRYSTALS
ELECTRONS
GADOLINIUM
IMPURITIES
IONS
LATTICES
MAGNETIC RESONANCE
MAGNETISM
PARAMAGNETISM
PHASE DIAGRAMS
PHYSICS
SPIN
STRONTIUM OXIDES
TEMPERATURE
TITANIUM OXIDES