Low temperature magnetocaloric properties of HoNi2

2003 ◽  
Vol 93 (10) ◽  
pp. 6939-6941 ◽  
Author(s):  
A. M. Gomes ◽  
I. S. Oliveira ◽  
A. P. Guimarães ◽  
A. L. Lima ◽  
P. J. von Ranke
Keyword(s):  
Low Temperature ◽  
Magnetocaloric Properties

Low temperature magnetocaloric properties of RE2/3Cu3Ti4O12 (RE = La, Ho and Dy) systems

2019 ◽  
Vol 6 (5) ◽  
pp. 056103 ◽  
Author(s):  
K Vinod ◽  
A T Satya ◽  
N Radhikesh Ravindran ◽  
R M Sarguna ◽  
Ramanathaswamy Pandian ◽  
...  
Keyword(s):  
Low Temperature ◽  
Magnetocaloric Properties

scholarly journals Gaudefroyite: a mineral with excellent magnetocaloric effect suitable for liquefying hydrogen

2018 ◽  
Vol 6 (13) ◽  
pp. 5260-5264 ◽  
Author(s):  
Rukang Li ◽  
Guangjing Li ◽  
Colin Greaves
Keyword(s):  
Low Temperature ◽  
Magnetocaloric Effect ◽  
Natural Mineral ◽  
Magnetocaloric Properties

A natural mineral, gaudefroyite, displays excellent low temperature magnetocaloric properties that are suitable for liquefying hydrogen.

Multiple magnetic transitions and magnetocaloric effect in hydrothermally synthesized single crystalline La0.5Sr0.5MnO3nanowires

2012 ◽  
Vol 1454 ◽  
pp. 63-68 ◽  
Author(s):  
Sayan Chandra ◽  
Anis Biswas ◽  
Subarna Datta ◽  
Barnali Ghosh ◽  
A.K. Raychaudhuri ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Low Temperature ◽  
Magnetocaloric Effect ◽  
Room Temperature ◽  
Magnetic State ◽  
Double Exchange ◽  
Synthesis Process ◽  
Theoretical Studies ◽  
Magnetic Transitions ◽  
Magnetocaloric Properties

ABSTRACTWe have successfully prepared La0.5Sr0.5MnO3nanowires using a novel hydrothermal synthesis process and studied their magnetic and magnetocaloric properties. The system exhibits an inverse magnetocaloric effect (IMCE) around 175 K indicating presence of significant AFM correlation. The MCE study reveals a clear paramagnetic (PM) to ferromagnetic (FM) transition near room temperature (T ~ 325K) which is followed by onset of AFM at lower temperatures. The development of the FM-like magnetic state at low temperature is attributed to the enhanced double exchange (DE) driven ferromagnetism in AFM state as predicted by recent theoretical studies.

Magnetic and magnetocaloric properties of Dy5Pd2: role of magnetic irreversibility

RSC Advances ◽  
2015 ◽  
Vol 5 (59) ◽  
pp. 47860-47865 ◽  
Author(s):  
Tapas Paramanik ◽  
Tapas Samanta ◽  
R. Ranganathan ◽  
I. Das
Keyword(s):  
Intermetallic Compound ◽  
Low Temperature ◽  
Magnetocaloric Effect ◽  
Temperature Region ◽  
Magnetocaloric Properties ◽  
Magnetic Irreversibility

In this report the origin of giant inverse magnetocaloric effect at low temperature region has been studied in cluster glass intermetallic compound Dy5Pd2. In this context the procedure to obtain reversible magnetocaloric effect using Maxwell’s relation has been described.

scholarly journals Новые магнитные материалы на основе соединений RNi для криогенной техники

2020 ◽  
Vol 46 (6) ◽  
pp. 51
Author(s):  
В.Б. Чжан ◽  
И.С. Терёшина ◽  
А.А. Курганская ◽  
С.А. Лушников ◽  
В.Н. Вербецкий ◽  
...  
Keyword(s):  
Low Temperature ◽  
Curie Temperature ◽  
Magnetocaloric Effect ◽  
Temperature Region ◽  
Partial Substitution ◽  
Temperature Range ◽  
Magnetocaloric Properties ◽  
Cryogenic Engineering ◽  
Significant Change ◽  
Curie Temperature Tc

Magnetocaloric properties of compounds Gd(Ni0.98Si0.02), Dy(Ni0.95Si0.05) and their hydrides Gd(Ni0.98Si0.02)H3, Dy(Ni0.95Si0.05)H4 were investigated in the temperature range 2 – 100K. It was found that partial substitution of Ni atoms by Si atoms, as well as subsequent hydrogenation can lead to a significant change in the Curie temperature (TC), the magnetocaloric effect, and the temperature at which the maximum MCE (Tmax) is observed. It is shown that the TC and Tmax of the hydrides are shifted by several degrees to the low temperature region with increasing or maintaining the MCE, which can significantly expand the application of such materials in cryogenic engineering.

scholarly journals Low-Temperature Magnetocaloric Properties of V12 Polyoxovanadate Molecular Magnet: A Theoretical Study

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4399 ◽  
Author(s):  
Karol Szałowski
Keyword(s):  
Low Temperature ◽  
Magnetocaloric Effect ◽  
Computational Study ◽  
Thermodynamic Description ◽  
Entropy Change ◽  
Molecular Magnet ◽  
Thermodynamic Quantities ◽  
Magnetocaloric Properties ◽  
Adiabatic Magnetization ◽  
Quantities Of Interest

The paper presents a computational study of the magnetocaloric properties of the V12 polyoxovanadate molecular magnet. The description is restricted to low-temperature range (below approximately 100 K), where the magnetic properties of the system in question can be sufficiently modelled by considering a tetramer that consists of four vanadium ions with spins S=1/2. The discussion is focused on the magnetocaloric effect in the cryogenic range. The exact and numerical diagonalization of the corresponding Hamiltonian is used in order to construct the thermodynamic description within a version of the canonical ensemble. The thermodynamic quantities of interest, such as magnetic entropy, specific heat, entropy change under isothermal magnetization/demagnetization, temperature change under adiabatic magnetization/demagnetization, refrigerant capacity, and magnetic Grüneisen ratio, are calculated and discussed extensively. The importance of two quantum level crossings for the described properties is emphasized. The significant ranges of direct and inverse magnetocaloric effect are predicted. In particular, the maximized inverse magnetocaloric response is found for cryogenic temperatures.

Optical and Low-Temperature Magnetocaloric Properties of HoCr0.5Mn0.5O3 Compound

2022 ◽  
Author(s):  
Komal Kanwar ◽  
M. Vasundhara ◽  
Sandeep Kumar ◽  
Pradip Kumar ◽  
S. D. Kaushik ◽  
...  
Keyword(s):  
Low Temperature ◽  
Magnetocaloric Properties

Exsolution and inversion in pigeonite from the Whin Sill, Northern England

1978 ◽  
Vol 36 (1) ◽  
pp. 474-475
Author(s):  
P.P.K. Smith
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Homogeneous Nucleation ◽  
Silicate Mineral ◽  
Antiphase Boundaries ◽  
Two Phase ◽  
Primitive Form ◽  
The Core ◽  
Nucleation Mechanisms ◽  
And Inversion

Grains of pigeonite, a calcium-poor silicate mineral of the pyroxene group, from the Whin Sill dolerite have been ion-thinned and examined by TEM. The pigeonite is strongly zoned chemically from the composition Wo8En64FS28 in the core to Wo13En34FS53 at the rim. Two phase transformations have occurred during the cooling of this pigeonite:- exsolution of augite, a more calcic pyroxene, and inversion of the pigeonite from the high- temperature C face-centred form to the low-temperature primitive form, with the formation of antiphase boundaries (APB's). Different sequences of these exsolution and inversion reactions, together with different nucleation mechanisms of the augite, have created three distinct microstructures depending on the position in the grain.In the core of the grains small platelets of augite about 0.02μm thick have farmed parallel to the (001) plane (Fig. 1). These are thought to have exsolved by homogeneous nucleation. Subsequently the inversion of the pigeonite has led to the creation of APB's.

Sign in / Sign up

Export Citation Format

Share Document