Nickolaus M. Bruno
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View article: Hybrid magnon-phonon localization enhances function near ferroic glassy states
Hybrid magnon-phonon localization enhances function near ferroic glassy states Open
Ferroic materials on the verge of forming ferroic glasses exhibit heightened functionality that is often attributed to competing long- and short-range correlations. However, the physics underlying these enhancements is not well understood.…
View article: Investigation of the inverse magnetocaloric effect with the fraction method
Investigation of the inverse magnetocaloric effect with the fraction method Open
In this study, we examine Ni 49 Nb 1 Mn 36 In 14 (nom. at.%) magnetic shape memory alloy (MSMA) to illustrate the inverse magnetocaloric effect (MCE) using the fraction method. The magnetic entropy change, , was calculated with both, the f…
View article: An Analytical Approach for Computing the Coefficient of Refrigeration Performance in Giant Inverse Magnetocaloric Materials
An Analytical Approach for Computing the Coefficient of Refrigeration Performance in Giant Inverse Magnetocaloric Materials Open
An analytical approach for computing the coefficient of refrigeration performance (CRP) was described for materials that exhibited a giant inverse magnetocaloric effect (MCE), and their governing thermodynamics were reviewed. The approach …
View article: On the instability of the giant direct magnetocaloric effect in CoMn0.915Fe0.085Ge at. % metamagnetic compounds
On the instability of the giant direct magnetocaloric effect in CoMn0.915Fe0.085Ge at. % metamagnetic compounds Open
The giant magnetocaloric effect was quantified in CoMn 1-x Fe x Ge (x = 0.085–0.12) nom. at. % polycrystals across the high temperature hexagonal (P6 3 /mmc) to low temperature orthorhombic (Pnma) phase transition via differential scanning…
View article: Glassy Phonon Heralds a Strain Glass State in a Shape Memory Alloy
Glassy Phonon Heralds a Strain Glass State in a Shape Memory Alloy Open
Shape memory strain glasses are frustrated ferroelastic materials with glasslike slow relaxation and nanodomains. It is possible to change a NiCoMnIn Heusler alloy from a martensitically transforming alloy to a nontransforming strain glass…
View article: Relative Cooling Power Enhancement of the Magnetic Refrigeration in Ni$_2$MnIn based Hesuler Alloys
Relative Cooling Power Enhancement of the Magnetic Refrigeration in Ni$_2$MnIn based Hesuler Alloys Open
Off-stoichiometric alloys based on Ni$_2$MnIn have drawn attention due to the large magnetocaloric entropy associated with the coupled first order magnetic and structural transformations. Here we present crystal structural, calorimetric an…
Reversible Martensitic Transformation under Low Magnetic Fields in Magnetic Shape Memory Alloys Open
Magnetic field-induced, reversible martensitic transformations in NiCoMnIn meta-magnetic shape memory alloys were studied under constant and varying mechanical loads to understand the role of coupled magneto-mechanical loading on the trans…
View article: Effect of grain constraint on the field requirements for magnetocaloric effect in Ni45Co5Mn40Sn10 melt-spun ribbons
Effect of grain constraint on the field requirements for magnetocaloric effect in Ni45Co5Mn40Sn10 melt-spun ribbons Open
The influence of grain constraint on the magnetic field levels required to complete the isothermal martensitic transformation in magnetic shape memory alloys has been demonstrated for a NiCoMnSn alloy, and the magnetocaloric performance of…