Sign in to use this feature.

Years

Between: -

Subjects

remove_circle_outline
remove_circle_outline
remove_circle_outline
remove_circle_outline
remove_circle_outline

Journals

Article Types

Countries / Regions

Search Results (3)

Search Parameters:
Keywords = NiCoMnAl Heusler alloys

Order results
Result details
Results per page
Select all
Export citation of selected articles as:
11 pages, 5516 KiB  
Article
Nano Scaled Checkerboards: A Long Range Ordering in NiCoMnAl Magnetic Shape Memory Alloy Thin Films with Martensitic Intercalations
by Daniela Ramermann, Andreas Becker, Björn Büker, Andreas Hütten and Inga Ennen
Appl. Sci. 2022, 12(3), 1748; https://doi.org/10.3390/app12031748 - 8 Feb 2022
Cited by 2 | Viewed by 2130
Abstract
Magnetic shape memory Heusler alloys, such as NiCoMnAl, are considered as promising candidates for magnetocaloric cooling applications. Grown in thin film systems of adjacent layers with austenite and martensite crystal structures of almost equal thicknesses, a long-range ordering phenomenon in the shape of [...] Read more.
Magnetic shape memory Heusler alloys, such as NiCoMnAl, are considered as promising candidates for magnetocaloric cooling applications. Grown in thin film systems of adjacent layers with austenite and martensite crystal structures of almost equal thicknesses, a long-range ordering phenomenon in the shape of a 3D checkerboard pattern occurs in NiCoMnAl samples. The crystallographic origin of the pattern is proven by transmission electron microscopy (TEM) techniques. The darker fields of the arrangement consist of martensite nuclei superposed with austenite, while the purely austenite regions appear bright in TEM cross sections. The nucleation process is presumably triggered by inhomogeneous local elastic stray fields of primary martensitic nuclei in the austenite matrix and limited by the thicknesses of the martensite and austenite thin films. Full article
(This article belongs to the Special Issue Advances in Magnetic Nanomaterials and Nanostructures)
Show Figures

Figure 1

9 pages, 1954 KiB  
Article
Growth and Characterisation of Antiferromagnetic Ni2MnAl Heusler Alloy Films
by Teodor Huminiuc, Oliver Whear, Andrew J. Vick, David C. Lloyd, Gonzalo Vallejo-Fernandez, Kevin O’Grady and Atsufumi Hirohata
Magnetochemistry 2021, 7(9), 127; https://doi.org/10.3390/magnetochemistry7090127 - 13 Sep 2021
Cited by 4 | Viewed by 3067
Abstract
Recent rapid advancement in antiferromagnetic spintronics paves a new path for efficient computing with THz operation. To date, major studies have been performed with conventional metallic, e.g., Ir-Mn and Pt-Mn, and semiconducting, e.g., CuMnAs, antiferromagnets, which may suffer from their elemental criticality and [...] Read more.
Recent rapid advancement in antiferromagnetic spintronics paves a new path for efficient computing with THz operation. To date, major studies have been performed with conventional metallic, e.g., Ir-Mn and Pt-Mn, and semiconducting, e.g., CuMnAs, antiferromagnets, which may suffer from their elemental criticality and high resistivity. In order to resolve these obstacles, new antiferromagnetic films are under intense development for device operation above room temperature. Here, we report the structural and magnetic properties of an antiferromagnetic Ni2MnAl Heusler alloy with and without Fe and Co doping in thin film form, which has significant potential for device applications. Full article
(This article belongs to the Special Issue Advances in Antiferromagnetic Spintronics)
Show Figures

Figure 1

14 pages, 3007 KiB  
Article
The Thermal Transformation Arrest Phenomenon in NiCoMnAl Heusler Alloys
by Xiao Xu, Wataru Ito, Masashi Tokunaga, Takumi Kihara, Kengo Oka, Rie Y. Umetsu, Takeshi Kanomata and Ryosuke Kainuma
Metals 2013, 3(3), 298-311; https://doi.org/10.3390/met3030298 - 22 Aug 2013
Cited by 38 | Viewed by 7522
Abstract
In this report, we present findings of systematic research on NiCoMnAl alloys, with the purpose of acquiring a higher thermal transformation arrest temperature (TA). By systematic research, TA in the NiCoMnAl alloy systems was raised up to 190 K, compared to the highest [...] Read more.
In this report, we present findings of systematic research on NiCoMnAl alloys, with the purpose of acquiring a higher thermal transformation arrest temperature (TA). By systematic research, TA in the NiCoMnAl alloy systems was raised up to 190 K, compared to the highest TA of 130 K in NiCoMnIn. For a selected alloy of Ni40Co10Mn33Al17, magnetization measurements were performed under a pulsed high magnetic field, and the critical magnetic field-temperature phase diagram was determined. The magnetic phase diagram for Ni50-xCoxMn50-yAly was also established. Moreover, from the discussion that the formerly called “kinetic arrest phenomenon” has both thermodynamic and kinetic factors, we suggest a terminology change to the “thermal transformation arrest phenomenon”. Full article
(This article belongs to the Special Issue Shape Memory Alloys)
Show Figures

Back to TopTop