Gd3 TeBO9 : A Rare-Earth Borate with Significant Magnetocaloric Effect
Changqing Zhou1,2, Rukang Li1,2
1Beijing Center for Crystal Research and Development Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, 100190, China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|November 7, 2023
Summary
Researchers developed Gd3TeBO9, a novel material for magnetic refrigeration. This compound offers a 33% higher gadolinium concentration than commercial GGG, enhancing its potential for efficient, low-temperature cooling and reducing liquid helium dependency.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Thermodynamics
Background:
- Magnetic refrigeration offers an alternative to traditional cooling methods.
- Gadolinium-based (Gd) materials are promising for low-temperature magnetic refrigeration.
- Reducing reliance on liquid helium is crucial for advanced cooling applications.
Purpose of the Study:
- To synthesize and characterize a novel Gd-based compound, Gd3TeBO9, for magnetic refrigeration.
- To evaluate its potential as a magnetocaloric material for extremely low temperatures.
Main Methods:
- Element substitution was employed to create the Gd3TeBO9 compound.
- Magnetic property measurements were conducted to determine its performance.
- Gd3+ concentration and magnetic entropy change were quantified.
Main Results:
- Gd3TeBO9 exhibits a significantly high Gd3+ concentration (2.4×10^24 ions/kg), 33% greater than commercial Gd3Ga5O12 (GGG).
- The material shows a large magnetic entropy change: 57.44 J/(kg·K) and 408 mJ/(cm³·K) at 2.6 K and 7 T.
- This performance is 1.5 times that of GGG.
Conclusions:
- Gd3TeBO9 demonstrates superior magnetocaloric properties compared to GGG.
- The compound shows significant potential for development as an advanced magnetocaloric material.
- This advancement could lead to more efficient low-temperature refrigeration and reduced liquid helium consumption.
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