Induced phase transitions in TbPO$sub 4$

Thesis/Dissertation · Mon Jan 01 04:00:00 EST 1973

OSTI ID:4145062

Boehm, W E

A report is given on the investigations of the absorption spectrum of Tb$sup 3+$ in TbPO$sub 4$. From the slope of the spectral lines, the crystallographic and magnetic properties of TbPO$sub 4$ were found in dependence of the temperature and an external magnetic field. At the temperature Tsub(D) = (3.3 +- 0.5) K, a crystallographic phase transition from a tetragonal to a lower symmetry occurs. This transition can be described by the cooperative Jahn-Teller effect theory. Furthermore, the subsequent antiferromagnetic order state below Tsub(N) = (2.15 +- 0.10) K was spectroscopically investigated: it was shown that TbPO$sub 4$ is an induced antiferromagnet. In addition, a few measurements of the magnetization and susceptibility on TbPO$sub 4$ which preceded the optical measurements could be understood from the interpretation of the spectra. (orig./ LH)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-33-007734
• OSTI ID: 4145062
• Country of Publication: Germany
• Language: German

Related Subjects

*TERBIUM PHOSPHATES-- MAGNETIC PROPERTIES
360202* --Materials--Ceramics
Cermets & Refractories-- Structure & Phase Studies
ANTIFERROMAGNETISM
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CRYSTALLOGRAPHY
ENERGY LEVELS
MAGNETIC FIELDS
MAGNETIC SUSCEPTIBILITY
MOLECULES
MONOCRYSTALS
N50130* --Metals
Ceramics
& Other Materials--Ceramics & Cermets--Properties
Structure & Phase Studies
SPECTRAL SHIFT
TETRAGONAL LATTICES
ULTRALOW TEMPERATURE
ZEEMAN EFFECT