Experimental Investigation on the Low-Temperature Anomalies in Dysprosium Iron Garnet (DyIG)

Journal Article · Tue Oct 15 04:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-019-5025-4· OSTI ID:22919538

Boutaba, Assia; Lahoubi, Mahieddine ^[1]; Varazashvili, Vera ^[2]; Pu, Shengli ^[3]

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1. Badji Mokhtar-Annaba University, Department of Physics, Laboratory L.P.S. (Algeria)
2. Ivane Javakhishvili Tbilisi State University, Institute of Inorganic Chemistry and Electrochemistry (Georgia)
3. University of Shanghai for Science and Technology, College of Science, Photonics Research Laboratory (China)

The anomalous physical properties of dysprosium iron garnet Dy{sub 3}Fe{sub 5}O{sub 12} or DyIG single crystals have been revisited at low temperatures. This paper presents results of experimental investigation based on specific heat, magnetization, and Faraday rotation measurements. The distinguishing features are the occurrence of two types of anomalies in the temperature dependences of some judicious quantities. The first one coincides with the previous first-order spin reorientation transition at T{sub SR} = 15 K where the iron sublattice magnetization vector M{sub Fe} changes from the <111> axis at high temperature toward the low angular phases below T{sub SR}. The second one takes place around the “low-temperature Belov point” T{sub B} = 42 K, confirming what had already been predicted previously about the paraprocess effect in this ferrimagnet. The results are compared with previous findings and discussed taking into account the coexistence of some concomitant phenomena such the magnetodielectric and Schottky effects which cause anomalies, respectively near T{sub SR} and T{sub B}.

• OSTI ID: 22919538
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 10 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPARATIVE EVALUATIONS
DYSPROSIUM COMPOUNDS
FARADAY EFFECT
FERRIMAGNETISM
FERRITE GARNETS
MAGNETIZATION
MONOCRYSTALS
SCHOTTKY EFFECT
SPECIFIC HEAT
SPIN
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0013-0065 K
TRANSITION TEMPERATURE