EPR Study of Monoclinic RbD_{2}PO_{4} Monocrystal Doped with Cr^{5+} Ion

• Authors: S. Waplak , L. Shuvalov
• Languages of publication: EN

Abstracts

EN

Deuterated monoclinic RbD_{2}PO_{4} (DRDP) doped with chromium Cr^{5+} is studied by EPR in 90 K to 400 K temperature range. EPR reveals two types of paramagnetic centers: single Cr^{5+} (S = 1/2) complex and Cr^{5+}-Cr^{5+} coupled pairs with effective spin S = 1. The EPR line splitting of single Cr^{5+} complex in DRDP versus temperature agrees with the unit cell multiplica­tion. The splitting of EPR line of pair spectrum appears at T* = 160 K, far below the phase transition temperatures and is due to the anisotropy of the exchange interaction. The clustering effect in the low-dimensional DRDP is suggested.

Keywords

EN

76.30.-v; 64.60.-i

Discipline

• 64.60.-i: General studies of phase transitions(see also 63.70.+h Statistical mechanics of lattice vibrations and displacive phase transitions; for critical phenomena in solid surfaces and interfaces, and in magnetism, see 68.35.Rh, and 75.40.-s, respectively)
• 76.30.-v: Electron paramagnetic resonance and relaxation(see also 33.35.+r Electron resonance and relaxation in atomic and molecular physics; 87.80.Lg Magnetic and paramagnetic resonance in biological physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1995
• Volume: 87
• Issue: 3
• Pages: 643-648

Dates

published

1995-03

received

1994-07-19

(unknown)

1994-09-13

(unknown)

1994-11-03

Contributors

author

S. Waplak

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17/19, 60-179 Poznań, Poland

author

L. Shuvalov

• Institute of Crystallography, Academy of Sciences, Moscow, Russia

Identifiers

DOI

10.12693/APhysPolA.87.643