skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Suppression of the ferromagnetic order in the Heusler alloy Ni{sub 50}Mn{sub 35}In{sub 15} by hydrostatic pressure

Abstract

We report on the effect of hydrostatic pressure on the magnetic and structural properties of the shape-memory Heusler alloy Ni{sub 50}Mn{sub 35}In{sub 15}. Magnetization and x-ray diffraction experiments were performed at hydrostatic pressures up to 5 GPa using diamond anvil cells. Pressure stabilizes the martensitic phase, shifting the martensitic transition to higher temperatures, and suppresses the ferromagnetic austenitic phase. Above 3 GPa, where the martensitic-transition temperature approaches the Curie temperature in the austenite, the magnetization shows no longer indications of ferromagnetic ordering. We further find an extended temperature region with a mixture of martensite and austenite phases, which directly relates to the magnetic properties.

Authors:
; ; ; ; ; ; ;  [1];  [2];  [1];  [3]
  1. Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, 01187 Dresden (Germany)
  2. ESRF, BP220, 38043 Grenoble (France)
  3. (Germany)
Publication Date:
OSTI Identifier:
22590652
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 26; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AUSTENITE; CURIE POINT; DIAMONDS; HEUSLER ALLOYS; MAGNETIC PROPERTIES; MARTENSITE; PHASE SHIFT; PHASE TRANSFORMATIONS; PRESSURE RANGE GIGA PA; SHAPE MEMORY EFFECT; X-RAY DIFFRACTION

Citation Formats

Salazar Mejía, C., E-mail: Catalina.Salazar@cpfs.mpg.de, Mydeen, K., Naumov, P., Medvedev, S. A., Wang, C., Schwarz, U., Felser, C., Nicklas, M., E-mail: nicklas@cpfs.mpg.de, Hanfland, M., Nayak, A. K., and Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle. Suppression of the ferromagnetic order in the Heusler alloy Ni{sub 50}Mn{sub 35}In{sub 15} by hydrostatic pressure. United States: N. p., 2016. Web. doi:10.1063/1.4954838.
Salazar Mejía, C., E-mail: Catalina.Salazar@cpfs.mpg.de, Mydeen, K., Naumov, P., Medvedev, S. A., Wang, C., Schwarz, U., Felser, C., Nicklas, M., E-mail: nicklas@cpfs.mpg.de, Hanfland, M., Nayak, A. K., & Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle. Suppression of the ferromagnetic order in the Heusler alloy Ni{sub 50}Mn{sub 35}In{sub 15} by hydrostatic pressure. United States. doi:10.1063/1.4954838.
Salazar Mejía, C., E-mail: Catalina.Salazar@cpfs.mpg.de, Mydeen, K., Naumov, P., Medvedev, S. A., Wang, C., Schwarz, U., Felser, C., Nicklas, M., E-mail: nicklas@cpfs.mpg.de, Hanfland, M., Nayak, A. K., and Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle. Mon . "Suppression of the ferromagnetic order in the Heusler alloy Ni{sub 50}Mn{sub 35}In{sub 15} by hydrostatic pressure". United States. doi:10.1063/1.4954838.
@article{osti_22590652,
title = {Suppression of the ferromagnetic order in the Heusler alloy Ni{sub 50}Mn{sub 35}In{sub 15} by hydrostatic pressure},
author = {Salazar Mejía, C., E-mail: Catalina.Salazar@cpfs.mpg.de and Mydeen, K. and Naumov, P. and Medvedev, S. A. and Wang, C. and Schwarz, U. and Felser, C. and Nicklas, M., E-mail: nicklas@cpfs.mpg.de and Hanfland, M. and Nayak, A. K. and Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle},
abstractNote = {We report on the effect of hydrostatic pressure on the magnetic and structural properties of the shape-memory Heusler alloy Ni{sub 50}Mn{sub 35}In{sub 15}. Magnetization and x-ray diffraction experiments were performed at hydrostatic pressures up to 5 GPa using diamond anvil cells. Pressure stabilizes the martensitic phase, shifting the martensitic transition to higher temperatures, and suppresses the ferromagnetic austenitic phase. Above 3 GPa, where the martensitic-transition temperature approaches the Curie temperature in the austenite, the magnetization shows no longer indications of ferromagnetic ordering. We further find an extended temperature region with a mixture of martensite and austenite phases, which directly relates to the magnetic properties.},
doi = {10.1063/1.4954838},
journal = {Applied Physics Letters},
number = 26,
volume = 108,
place = {United States},
year = {Mon Jun 27 00:00:00 EDT 2016},
month = {Mon Jun 27 00:00:00 EDT 2016}
}
  • The magnetization, the electrical resistivity, the magnetoresistance, and the Hall resistivity of Ni{sub 50}Mn{sub 35}In{sub 15-x}Si{sub x} (x = 1.0, 3.0, 4.0) Heusler alloys are studied at T = 80-320 K. The martensitic transformation in these alloys occurs at T = 220-280 K from the high-temperature ferromagnetic austenite phase into the low-temperature martensite phase having a substantially lower magnetization. A method is proposed to determine the normal and anomalous Hall effect coefficients in the presence of magnetoresistance and a possible magnetization dependence of these coefficients. The resistivity of the alloys increases jumpwise during the martensitic transformation, reaches 150-200 {mu}{Omega} cm,more » and is almost temperature-independent. The normal Hall effect coefficient is negative, is higher than that of nickel by an order of magnitude at T = 80 K, decreases monotonically with increasing temperature, approaches zero in austenite, and does not undergo sharp changes in the vicinity of the martensitic transformation. At x = 3, a normal Hall effect nonlinear in magnetization is detected in the immediate vicinity of the martensitic transformation. The temperature dependences of the anomalous Hall effect coefficient in both martensite and austenite and, especially, in the vicinity of the martensitic transformation cannot be described in terms of the skew scattering, the side jump, and the Karplus-Lutinger mechanisms from the anomalous Hall effect theory. The possible causes of this behavior of the magnetotransport properties in Heusler alloys are discussed.« less
  • The magnetic and magnetocaloric properties of Ni{sub 48}Co{sub 2}Mn{sub 35}In{sub 15} were studied using magnetization and heat capacity measurements. The magnetic entropy change ({Delta}S{sub M}) was evaluated from both magnetizing and demagnetizing fields. An inverse {Delta}S{sub M} for the magnetizing and demagnetizing processes were found to be 20.5 and 18.5 J kg{sup -1} K{sup -1}, respectively, for {Delta}H = 5 T at the martensitic transition (T = T{sub M}). The normal {Delta}S{sub M} was found to be -5.4 J kg{sup -1} K{sup -1} for both fields at the paramagnetic/ferromagnetic transition (T = T{sub C}). The effective refrigeration capacity at T{submore » M} and T{sub C} for magnetizing field was found to be 268 and 243 J/kg (285 and 243 J/kg for the demagnetizing field), respectively. We have also estimated the density of states, the Debye temperature, and the inverse adiabatic temperature change to be 4.93 states/eV f.u., 314 K, and -3.7 K, respectively, from the measured heat capacity data.« less
  • The Ni-Mn-Sn alloys are a pioneering series of magnetocaloric materials of a huge heat-energy exchanger in the martensite transition. A small additive of nearly 2 at% Cr effectively tunes the valence electron density of 8.090 electrons per atom and a large change in the entropy ΔS{sub M←A} = 4.428 J/kg-K (ΔS{sub M→A} = 3.695 J/kg-K in the recycle) at the martensite ← austenite phase transition as it is useful for the magnetic refrigeration and other cooling devices. The Cr additive tempers the tetragonality with the aspect ratio c/a = 0.903 of the martensite phase and exhibits an adiabatic temperature changemore » of 10 K. At room temperature, a hysteresis loop exhibits 48.91 emu/g saturation magnetization and 82.1 Oe coercivity.« less