50 MeV, Li{sup 3+} - ion irradiation effect on magnetic ordering of Y{sup 3+} - substituted yttrium iron garnet

Journal Article · Fri May 06 00:00:00 EDT 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4946154· OSTI ID:22591282

Sharma, P. U. ^[1]; Zankat, K. B. ^[2]; Dolia, S. N. ^[3]

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1. M. N. College, Visnagar 384315 (India)
2. Government Science College, Sector 15, Gandhinagar 382016 (India)
3. Department of Physics, University of Rajasthan, Jaipur 302055 (India)

This communication presents the effect of non-magnetic Y{sup 3+} ions substitution for magnetic Fe{sup 3+} ions and 50 MeV, Li{sup 3+} ion irradiation (fluence: 5 × 10{sup 13} ions/cm{sup 2}) on magnetic ordering and Neel temperature of Y{sub 3+x}Fe{sub 5-x}O{sub 12} (x = 0.0, 0.2, 0.4 and 0.6) garnet system, studied by means of X-ray powder diffractometry and thermal variation of low field (0.5 Oe) ac susceptibility measurements. The un-irradiated compositions exhibit normal ferrimagnetic behavior with decrease in transition temperature (T{sub N}) on increasing Y{sup 3+}-concentration (x). The irradiated counterparts are characterized by tailing effect indicative of non-uniform effect of irradiation and lower value of T{sub N}. The results have been discussed based on the weakening of magnetic exchange interactions and cumulative effect of redistribution of cations and fractional creation of localized paramagnetic centers resulting from swift heavy ion irradiation. The Neel temperatures and exchange integrals have been calculated theoretically.

• OSTI ID: 22591282
• Journal Information: AIP Conference Proceedings, Vol. 1728, Issue 1; Conference: ICC 2015: International conference on condensed matter and applied physics, Bikaner (India), 30-31 Oct 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CATIONS
CONCENTRATION RATIO
EXCHANGE INTERACTIONS
FERRATES
FERRITE GARNETS
IRON IONS
IRRADIATION
LITHIUM IONS
MAGNETIZATION
MEV RANGE
MULTICHARGED IONS
NEEL TEMPERATURE
PARAMAGNETISM
POWDERS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM IONS