Journal ArticleDOI
Electrical transport and magnetism in Mo-substituted R2Ti3Ge4 (R=Tb,Er) compounds
Reads0
Chats0
TLDR
In this article, the effect of Mo substitution at the Ti site of orthorhombic Sm5Ge4-type R2Ti3Ge4 compounds on the magnetic and electrical transport properties has been studied.Abstract:
The effect of Mo substitution at Ti site of orthorhombic Sm5Ge4-type R2Ti3Ge4 compounds on the magnetic and electrical transport properties has been studied. The Tb2Ti3−xMoxGe4 (x=0.3,0.75) and Er2Ti2.7Mo0.3Ge4 compounds have been synthesized and it is found that these compounds retain parent crystal structure at room temperature (space group Pnma, No. 62). Mo substitution decreases the antiferromagnetic ordering temperature (TN) of Tb2Ti3Ge4 compound from ∼18 to ∼13 and ∼10 K, respectively, for x=0.3 and 0.75. The Er2Ti2.7Mo0.3Ge4 compound shows a tendency to order at ∼2 K, whereas the parent Er2Ti3Ge4 is magnetically ordered at 3 K. Magnetization versus field data of Tb2Ti3−xMoxGe4 (x=0.3,0.75) reveal soft ferromagnetic nature. The metamagnetic transition that is present in parent Tb2Ti3Ge4 is found to disappear with Mo substitution. Magnetization value reaches ∼6.2μB/Tb3+ at 2 K in fields of 8 T, indicating incomplete ferromagnetic ordering with or without an antiferromagnetic component. Electrical res...read more
Citations
More filters
Journal ArticleDOI
Magnetocaloric effect in R2Ti3Ge4 (R = Gd, Tb and Er) Compounds
TL;DR: In this article, the magnetocaloric effect of polycrystalline R2Ti3Ge4 (R = Gd, Tb and Er) compounds (Orthorhombic, Sm5Ge4-type, Space group Pnma) was studied in the temperature range of 1.8 K to 300 K in various applied magnetic fields.
References
More filters
Journal ArticleDOI
Developments in magnetocaloric refrigeration
TL;DR: In this article, a review of magnetic refrigerant-materials for room-temperature applications is presented, considering both scientific aspects and industrial applicability, and some theoretical considerations.
Journal ArticleDOI
Reduction of hysteresis losses in the magnetic refrigerant Gd5Ge2Si2 by the addition of iron.
TL;DR: Although the addition of iron does not significantly affect the refrigerant capacity of the material, a greater net capacity is obtained when the hysteresis losses are accounted for and the iron-containing alloy is thus a much-improved magnetic refrigerant for near-room-temperature applications.
Journal ArticleDOI
Tunable magnetic regenerator alloys with a giant magnetocaloric effect for magnetic refrigeration from ∼20 to ∼290 K
TL;DR: In this article, a giant magnetocaloric effect (ΔSmag) has been discovered in the Gd5(SixGe1−x)4 pseudobinary alloys, where x⩽0.5 is the largest order phase transformation.
Journal ArticleDOI
X-ray powder diffractometer for in situ structural studies in magnetic fields from 0 to 35 kOe between 2.2 and 315 K
TL;DR: In this paper, a technique for studying magnetic field induced structural changes at the atomic resolution is described, which involves the coupling of a high resolution laboratory x-ray powder diffractometer, a helium flow cryostat, and a split-coil superconducting magnet allowing for in situ structural studies in a magnetic field between 0 to 35 kOe, and temperature between 2.2 to 315 K.
Journal ArticleDOI
Crystallographic data of new ternary Sm5Ge4-type R2Ti3Ge4 compounds (R=Gd-Er)
TL;DR: In this paper, powder X-ray diffraction on five new ternary R2Ti3Ge4 compounds (R=Gd-Er) is reported, which crystallize in the orthorhombic Sm5Ge4-type structure (space group Pnma).