# Influence of copper substitution on the magnetic and magnetocaloric properties of NiMnInB alloys

## Abstract

The structural, magnetocaloric, and thermomagnetic properties of Ni{sub 50.51}Mn{sub 34.34−x}Cu{sub x}In{sub 14.14}B{sub 1.01} with x = (0, 1.26, and 2.02) have been studied using room-temperature x-ray diffraction, differential scanning calorimetry (DSC), and magnetization measurements. The partial substitution of Cu for Mn was found to shift both the martensitic transition temperature (T{sub M}) and the Curie temperature (T{sub C}) to lower temperatures. The values of the latent heat (L = 9.4 J/g) and corresponding magnetic (ΔS{sub M}) and total entropy (ΔS{sub T}) changes (ΔS{sub M} = 22.60 J/kg K for ΔH = 5 T and ΔS{sub T} = 29.7 J/kg K) have been evaluated using magnetic and DSC measurements, respectively, for the sample with x = 1.26. Large negative values of ΔS{sub M} of −7.27 and −5.98 J/kg K for ΔH = 5 T in the vicinity of T{sub C} were observed for x = 1.26 and 2.02, respectively. It has been found that the application of hydrostatic pressure changes the magnetic ground state of the martensitic phase and increases the temperature stability of the martensitic phase. The roles of the magnetic and structural changes on the transition temperatures are discussed.

- Authors:

- Department of Physics, Southern Illinois University, Carbondale, Illinois 62901 (United States)
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803 (United States)

- Publication Date:

- OSTI Identifier:
- 22409930

- Resource Type:
- Journal Article

- Journal Name:
- Journal of Applied Physics

- Additional Journal Information:
- Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; CALORIMETRY; COPPER; COPPER ALLOYS; CURIE POINT; DIFFERENTIAL THERMAL ANALYSIS; ENTROPY; GROUND STATES; INDIUM ALLOYS; MAGNETIZATION; MANGANESE ALLOYS; MARTENSITIC STEELS; NICKEL BASE ALLOYS; PHASE STABILITY; PHASE STUDIES; PHASE TRANSFORMATIONS; TEMPERATURE RANGE 0273-0400 K; THERMOMAGNETISM; X-RAY DIFFRACTION

### Citation Formats

```
Pandey, Sudip, E-mail: sudip@siu.edu, Quetz, Abdiel, Aryal, Anil, Dubenko, Igor, Ali, Naushad, Samanta, Tapas, and Stadler, Shane.
```*Influence of copper substitution on the magnetic and magnetocaloric properties of NiMnInB alloys*. United States: N. p., 2015.
Web. doi:10.1063/1.4916809.

```
Pandey, Sudip, E-mail: sudip@siu.edu, Quetz, Abdiel, Aryal, Anil, Dubenko, Igor, Ali, Naushad, Samanta, Tapas, & Stadler, Shane.
```*Influence of copper substitution on the magnetic and magnetocaloric properties of NiMnInB alloys*. United States. doi:10.1063/1.4916809.

```
Pandey, Sudip, E-mail: sudip@siu.edu, Quetz, Abdiel, Aryal, Anil, Dubenko, Igor, Ali, Naushad, Samanta, Tapas, and Stadler, Shane. Thu .
"Influence of copper substitution on the magnetic and magnetocaloric properties of NiMnInB alloys". United States. doi:10.1063/1.4916809.
```

```
@article{osti_22409930,
```

title = {Influence of copper substitution on the magnetic and magnetocaloric properties of NiMnInB alloys},

author = {Pandey, Sudip, E-mail: sudip@siu.edu and Quetz, Abdiel and Aryal, Anil and Dubenko, Igor and Ali, Naushad and Samanta, Tapas and Stadler, Shane},

abstractNote = {The structural, magnetocaloric, and thermomagnetic properties of Ni{sub 50.51}Mn{sub 34.34−x}Cu{sub x}In{sub 14.14}B{sub 1.01} with x = (0, 1.26, and 2.02) have been studied using room-temperature x-ray diffraction, differential scanning calorimetry (DSC), and magnetization measurements. The partial substitution of Cu for Mn was found to shift both the martensitic transition temperature (T{sub M}) and the Curie temperature (T{sub C}) to lower temperatures. The values of the latent heat (L = 9.4 J/g) and corresponding magnetic (ΔS{sub M}) and total entropy (ΔS{sub T}) changes (ΔS{sub M} = 22.60 J/kg K for ΔH = 5 T and ΔS{sub T} = 29.7 J/kg K) have been evaluated using magnetic and DSC measurements, respectively, for the sample with x = 1.26. Large negative values of ΔS{sub M} of −7.27 and −5.98 J/kg K for ΔH = 5 T in the vicinity of T{sub C} were observed for x = 1.26 and 2.02, respectively. It has been found that the application of hydrostatic pressure changes the magnetic ground state of the martensitic phase and increases the temperature stability of the martensitic phase. The roles of the magnetic and structural changes on the transition temperatures are discussed.},

doi = {10.1063/1.4916809},

journal = {Journal of Applied Physics},

issn = {0021-8979},

number = 17,

volume = 117,

place = {United States},

year = {2015},

month = {5}

}