EPR Study of Fe^{3+} Paramagnetic Centers in Doped Triglycine Sulphate Crystals

• Authors: Sz. Łoś , Z. Trybuła
• Languages of publication: EN

Abstracts

EN

This paper presents EPR study of Fe^{3+} in triglycine sulphate doped with Fe^{3+} crystal. Fe^{3 +} ion is in a high spin state S=5/2. EPR signal can be detected only below 200 K. At 4.2 K the EPR spectrum results from three non-equivalent sites of Fe^{3+} ions. The spin Hamiltonian: H=β BĝS+D[S^2_z-(1/3)S(S+1)]+E(S^2_x-S^2_y) has been applied to describe the spectrum. The zero field splitting parameter in this case fulfills the condition: D≫hν. An experimental spectrum reflects clearly only two resonance transitions: |±1/2ã (the lowest Kramers doublet) and |±3/2〉 (the middle Kramers doublet). The iron complexes occupy interstitial positions in the crystal with distorted octahedral or tetrahedral co-ordination.

Keywords

EN

76.30.Fc; 77.80.-e

Discipline

• 76.30.Fc: Iron group (3d) ions and impurities (Ti-Cu)
• 77.80.-e: Ferroelectricity and antiferroelectricity

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2002
• Volume: 101
• Issue: 2
• Pages: 279-287

Dates

published

2002-02

received

2001-10-16

Contributors

author

Sz. Łoś

• Institute of Molecular Physics, Polish Academy of Science, Smoluchowskiego 17, 60-179 Poznań, Poland

author

Z. Trybuła

• Institute of Molecular Physics, Polish Academy of Science, Smoluchowskiego 17, 60-179 Poznań, Poland

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Identifiers

DOI

10.12693/APhysPolA.101.279