Complex magnetic ordering as a driving mechanism of multifunctional properties of Heusler alloys from first principles

Entel, P.; Siewert, Mario; Gruner, Markus E.; Herper, Heike C.; Comtesse, Denis; Arróyave, Raymundo; Singh, Navdeep; Talapatra, Anjana; Sokolovskiy, V. V.; Albertini, F.; Righi, Lara; Chernenko, V.A.

doi:10.1140/epjb/e2012-30936-9

Cited by 90 publications

(48 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The comparison shows remarkable similarities associated with the inverse magnetocaloric effect emerging from the magnetostructural transition in the magnetic Heusler alloys with the corresponding magnetostructural transition and caloric effect of the Gd based and Fe-Rh-Pd based compounds as discussed below. Figure 1 shows the intersection of structural and magnetic phase transitions in the phase diagrams of Ni-Mn-Ga and Ni-Mn-In as a function of the valence electron concentration [20,21]. The ab initio calculations in combination with Monte Carlo simulations reproduce fairly well the experimental phase diagrams, which have been discussed in [3].…”

Section: Introductionmentioning

confidence: 61%

“…This is because the distance between nearest neighbor Mn atoms on the Mn sublattice is a√2/2, where a is the lattice constant of the cubic L2 1 structure, causing ferromagnetic order, which is reduced to a/2 for nearest neighbor Mn Y and Mn Z atoms, causing antiferromagnetic order. Since the magnetic moment of Mn is ≈ 4 μ B , this spin flip has a large effect and leads to metamagnetic behavior of the Mn-based Heusler alloys (see also [21,25]). This is discussed in more detail below.…”

Section: Structural and Magnetic Phase Diagrams Of Heusler Intermetalmentioning

confidence: 99%

“…[3]. Dark lines (blue, indigo) mark martensitic L2 1 -L1 0 transformation temperatures (from ab initio total energy differences between austenite and martensite [20,21]) and Curie temperatures (from Monte Carlo simulations using ab initio magnetic exchange coupling constants [20,21]), respectively. Recent ab initio calculations have been done along the path marked by the arrow in each phase diagram.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Large magnetocaloric effects in magnetic intermetallics: First-principles and Monte Carlo studies

Entel

Gruner

Ogura

et al. 2015

MATEC Web of Conferences

Self Cite

View full text Add to dashboard Cite

Abstract.We have performed ab initio electronic structure calculations and Monte Carlo simulations of frustrated ferroic materials where complex magnetic configurations and chemical disorder lead to rich phase diagrams. With lowering of temperature, we find a ferromagnetic phase which transforms to an antiferromagnetic phase at the magnetostructural (martensitic) phase transition and to a cluster spin glass at still lower temperatures. The Heusler alloys Ni-(Co)-Mn-(Cr)-(Ga, Al, In, Sn, Sb) are of particular interest because of their large inverse magnetocaloric effect associated with the magnetostructural transition and the influence of Co/Cr doping. Besides spin glass features, strain glass behavior has been observed in Ni-Co-Mn-In. The numerical simulations allow a complete characterization of the frustrated ferroic materials including the Fe-Rh-Pd alloys.

show abstract

Section: Introductionmentioning

confidence: 61%

Section: Structural and Magnetic Phase Diagrams Of Heusler Intermetalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Large magnetocaloric effects in magnetic intermetallics: First-principles and Monte Carlo studies

Entel

Gruner

Ogura

et al. 2015

MATEC Web of Conferences

Self Cite

View full text Add to dashboard Cite

show abstract

“…In, Sn, Sb based families of alloys show a linear dependence of martensitic transformation on valence electrons number [21,22]. It has also been recently shown that chemical order plays a primary role in determining martensitic properties [23,24].…”

Section: Introductionmentioning

confidence: 99%

Co and In Doped Ni-Mn-Ga Magnetic Shape Memory Alloys: A Thorough Structural, Magnetic and Magnetocaloric Study

Fabbrici

Porcari

Cugini

et al. 2014

Entropy

Self Cite

View full text Add to dashboard Cite

Abstract:In Ni-Mn-Ga ferromagnetic shape memory alloys, Co-doping plays a major role in determining a peculiar phase diagram where, besides a change in the critical temperatures, a change of number, order and nature of phase transitions (e.g., from ferromagnetic to paramagnetic or from paramagnetic to ferromagnetic, on heating) can be obtained, together with a change in the giant magnetocaloric effect from direct to inverse. Here we present a thorough study of the intrinsic magnetic and structural properties, including their dependence on hydrostatic pressure, that are at the basis of the multifunctional behavior of Co and In-doped alloys. We study in depth their magnetocaloric properties, taking advantage of complementary calorimetric and magnetic techniques, and show that if a proper measurement protocol is adopted they all merge to the same values, even in case of first order transitions. A simplified model for the estimation of the adiabatic temperature change that relies only on indirect measurements is OPEN ACCESSEntropy 2014, 16 2205 proposed, allowing for the quick and reliable evaluation of the magnetocaloric potentiality of new materials starting from readily available magnetic measurements.

show abstract

“…A: Magnetic field influence on martensite transformation in ferromagnetic shape memory alloys and metamagnetic shape memory alloys [64][65][66][67][68][69][70]; B: Magnetic anisotropy of the ferromagnetic shape memory alloys [71,72]; C: Magnetostriction [73,74].…”

Section: Magnetic Field-induced Strain and Magnetostriction In Shape mentioning

confidence: 99%

Magneto-Structural Properties of Ni2MnGa Ferromagnetic Shape Memory Alloy in Magnetic Fields

Sakon

Adachi

Kanomata

2013

Metals

View full text Add to dashboard Cite

Abstract:The purpose of this review was to investigate the correlation between magnetism and crystallographic structures as it relates to the martensite transformation of Ni 2 MnGa type alloys, which undergo martensite transformation below the Curie temperature. In particular, this paper focused on the physical properties in magnetic fields. Recent researches show that the martensite starting temperature (martensite transformation temperature) T M and the martensite to austenite transformation temperature (reverse martensite temperature) T R of Fe, Cu, or Co-doped Ni-Mn-Ga ferromagnetic shape memory alloys increase when compared to Ni 2 MnGa. These alloys show large field dependence of the martensite transformation temperature. The field dependence of the martensite transformation temperature, dT M /dB, is −4.2 K/T in Ni 41 Co 9 Mn 32 Ga 18 . The results of linear thermal strain and magnetization indicate that a magneto-structural transition occurred at T M and magnetic field influences the magnetism and also the crystal structures. Magnetocrystalline anisotropy was also determined and compared with other components of Ni 2 MnGa type shape memory alloys. In the last section, magnetic field-induced strain and magnetostriction was determined with some novel alloys. OPEN ACCESS

show abstract

Complex magnetic ordering as a driving mechanism of multifunctional properties of Heusler alloys from first principles

Cited by 90 publications

References 73 publications

Large magnetocaloric effects in magnetic intermetallics: First-principles and Monte Carlo studies

Large magnetocaloric effects in magnetic intermetallics: First-principles and Monte Carlo studies

Co and In Doped Ni-Mn-Ga Magnetic Shape Memory Alloys: A Thorough Structural, Magnetic and Magnetocaloric Study

Magneto-Structural Properties of Ni2MnGa Ferromagnetic Shape Memory Alloy in Magnetic Fields

Contact Info

Product

Resources

About