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Peltier cell calorimetry “as an option” for commonplace cryostats: Application to the case of MnFe(P,Si,B) magnetocaloric materials. FUNDAMENTAL RESEARCH 2022. [DOI: 10.1016/j.fmre.2022.09.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Bar T, Bansal B. Absolute calibration of the latent heat of transition using differential thermal analysis. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2021; 92:075106. [PMID: 34340427 DOI: 10.1063/5.0056857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 07/01/2021] [Indexed: 06/13/2023]
Abstract
We describe a simple and accurate differential thermal analysis setup to measure the latent heat of solid state materials undergoing abrupt phase transitions in the temperature range from 77 K to above room temperature. We report a numerical technique for the absolute calibration of the latent heat of transition without the need for a reference sample. The technique is applied to three different samples-vanadium sesquioxide undergoing the Mott transition, bismuth barium ruthenate undergoing a magnetoelastic transition, and an intermetallic Heusler compound. In each case, the inferred latent heat value agrees with the literature value within its error margins. To further demonstrate the importance of absolute calibration, we show that the changes in the latent heat of the Mott transition in vanadium sesquioxide (V2O3) remain constant to within 2% even as the depth of supersaturation changes by about 10 K in non-equilibrium dynamic hysteresis measurements. We also apply this technique for the measurement of the temperature-dependent specific heat.
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Affiliation(s)
- Tapas Bar
- Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Nadia 741246, West Bengal, India
| | - Bhavtosh Bansal
- Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Nadia 741246, West Bengal, India
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Döntgen J, Rudolph J, Waske A, Hägele D. Modulation infrared thermometry of caloric effects at up to kHz frequencies. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:033909. [PMID: 29604800 DOI: 10.1063/1.5008506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We present a novel non-contact method for the direct measurement of caloric effects in low volume samples. The adiabatic temperature change ΔT of a magnetocaloric sample is very sensitively determined from thermal radiation. Rapid modulation of ΔT is induced by an oscillating external magnetic field. Detection of thermal radiation with a mercury-cadmium-telluride detector allows for measurements at field frequencies exceeding 1 kHz. In contrast to thermoacoustic methods, our method can be employed in vacuum which enhances adiabatic conditions especially in the case of small volume samples. Systematic measurements of the magnetocaloric effect as a function of temperature, magnetic field amplitude, and modulation frequency give a detailed picture of the thermal behavior of the sample. Highly sensitive measurements of the magnetocaloric effect are demonstrated on a 2 mm thick sample of gadolinium and a 60 μm thick Fe80B12Nb8 ribbon.
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Affiliation(s)
- Jago Döntgen
- AG Spektroskopie der kondensierten Materie, Ruhr-Universität Bochum, Universitätsstr. 150, 44801 Bochum, Germany
| | - Jörg Rudolph
- AG Spektroskopie der kondensierten Materie, Ruhr-Universität Bochum, Universitätsstr. 150, 44801 Bochum, Germany
| | - Anja Waske
- Institute for Complex Materials, IFW Dresden, Helmholtzstr. 20, 01069 Dresden, Germany
| | - Daniel Hägele
- AG Spektroskopie der kondensierten Materie, Ruhr-Universität Bochum, Universitätsstr. 150, 44801 Bochum, Germany
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Lovell E, Bratko M, Caplin AD, Barcza A, Katter M, Ghivelder L, Cohen LF. Magnetic relaxation dynamics driven by the first-order character of magnetocaloric La(Fe,Mn,Si)13. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2016; 374:rsta.2015.0307. [PMID: 27402929 PMCID: PMC4938066 DOI: 10.1098/rsta.2015.0307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/18/2016] [Indexed: 06/06/2023]
Abstract
Here, we study the temporal evolution of the magnetic field-driven paramagnetic to ferromagnetic transition in the La(Fe,Mn,Si)13 material family. Three compositions are chosen that show varying strengths of the first-order character of the transition, as determined by the relative magnitude of their magnetic hysteresis and temperature separation between the zero-field transition temperature Tc and the temperature Tcrit, where the transition becomes continuous. Systematic variations in the fixed field, isothermal rate of relaxation are observed as a function of temperature and as a function of the degree of first-order character. The relaxation rate is reduced in more weakly first-order compositions and is also reduced as the temperature is increased towards Tcrit At temperatures above Tcrit, the metastability of the transition vanishes along with its associated temporal dynamics.This article is part of the themed issue 'Taking the temperature of phase transitions in cool materials'.
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Affiliation(s)
- Edmund Lovell
- Blackett Laboratory, Imperial College London, London SW7 2AZ, UK
| | - Milan Bratko
- Blackett Laboratory, Imperial College London, London SW7 2AZ, UK
| | - A David Caplin
- Blackett Laboratory, Imperial College London, London SW7 2AZ, UK
| | | | | | - Luis Ghivelder
- Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-972, Brazil
| | - Lesley F Cohen
- Blackett Laboratory, Imperial College London, London SW7 2AZ, UK
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Cugini F, Porcari G, Solzi M. Non-contact direct measurement of the magnetocaloric effect in thin samples. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2014; 85:074902. [PMID: 25085161 DOI: 10.1063/1.4890394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
An experimental setup, based on a non-contact temperature sensor, is proposed to directly measure the magnetocaloric effect of samples few micrometers thick. The measurement of the adiabatic temperature change of foils and ribbons is fundamental to design innovative devices based on magnetocaloric thin materials or micro-structuring bulk samples. The reliability of the proposed setup is demonstrated by comparing the measurements performed on a bulk gadolinium sample with the results obtained by an experimental setup based on a Cernox bare chip thermoresistance and by in-field differential scanning calorimetry. We show that this technique can measure the adiabatic temperature variation on gadolinium sheets as thin as 27 μm. Heat transfer simulations are added to describe the capability of the presented technique.
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Affiliation(s)
- F Cugini
- Department of Physics and Earth Sciences, University of Parma, Parco Area delle Scienze 7/A, 43124 Parma, Italy
| | - G Porcari
- Department of Physics and Earth Sciences, University of Parma, Parco Area delle Scienze 7/A, 43124 Parma, Italy
| | - M Solzi
- Department of Physics and Earth Sciences, University of Parma, Parco Area delle Scienze 7/A, 43124 Parma, Italy
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Porcari G, Buzzi M, Cugini F, Pellicelli R, Pernechele C, Caron L, Brück E, Solzi M. Direct magnetocaloric characterization and simulation of thermomagnetic cycles. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:073907. [PMID: 23902084 DOI: 10.1063/1.4815825] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
An experimental setup for the direct measurement of the magnetocaloric effect capable of simulating high frequency magnetothermal cycles on laboratory-scale samples is described. The study of the magnetocaloric properties of working materials under operative conditions is fundamental for the development of innovative devices. Frequency and time dependent characterization can provide essential information on intrinsic features such as magnetic field induced fatigue in materials undergoing first order magnetic phase transitions. A full characterization of the adiabatic temperature change performed for a sample of Gadolinium across its Curie transition shows the good agreement between our results and literature data and in-field differential scanning calorimetry.
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Affiliation(s)
- G Porcari
- Department of Physics and Earth Sciences, University of Parma, Viale G.P. Usberti n.7/A (Parco Area delle Scienze), 43124 Parma, Italy.
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Morrison K, Bratko M, Turcaud J, Berenov A, Caplin AD, Cohen LF. A calorimetric method to detect a weak or distributed latent heat contribution at first order magnetic transitions. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:033901. [PMID: 22462932 DOI: 10.1063/1.3690381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Microcalorimetry has proven to be a versatile tool to investigate first order magnetic phase transitions as it can be used in different experimental modes to separate the latent heat from heat capacity. However, the methodology fails if the latent heat contribution is below instrumental resolution of 10 nJ. If the nucleation size of the new phase is much less than 100 μm, the typical size of the fragment measured, the latent heat could appear to be too distributed in temperature or magnetic field to be detected. Here, we show that for certain classes of magnetic transition, our microcalorimetry technique can be extended to enable an estimate of the latent heat to be obtained from a combination of heat capacity and magnetic measurements. This technique is best suited for material systems with weakly first order phase transitions, or highly distributed due to inhomogeneity.
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Affiliation(s)
- K Morrison
- Blackett Laboratory, Imperial College London, London, SW7 2AZ United Kingdom.
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Yi F, La Van DA. Nanoscale thermal analysis for nanomedicine by nanocalorimetry. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2011; 4:31-41. [PMID: 21766469 DOI: 10.1002/wnan.155] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Microfabricated nanocalorimeters sensitively measure the thermal properties of nanomaterials and can be used for biomedical and in vitro measurements. This review examines the capabilities of nanocalorimeters including specific applications to nanomedicine such as measurements of nanomaterial stability, protein crystallization, ligand-protein binding, phase transitions, phase separations, interfacial reactions, and sorption-desorption phenomena. Widespread adoption of nanotechnology into clinical medicine will require a more complete understanding of the basic properties of nanomaterials, the relationship between nanomaterial processing, and physical properties and a deeper understanding of how nanomaterial physical properties control biological interactions. Nanocalorimetry is suitable where high sensitivity and high-rate thermal and thermodynamic measurements are needed. Because of their small size and rapid measurement speed, nanocalorimeters can be used for single measurements or with high throughput automation.
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Affiliation(s)
- Feng Yi
- Ceramics Division, Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, USA
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Planes A, Mañosa L, Acet M. Magnetocaloric effect and its relation to shape-memory properties in ferromagnetic Heusler alloys. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2009; 21:233201. [PMID: 21825579 DOI: 10.1088/0953-8984/21/23/233201] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Magnetic Heusler alloys which undergo a martensitic transition display interesting functional properties. In the present review, we survey the magnetocaloric effects of Ni-Mn-based Heusler alloys and discuss their relation with the magnetic shape-memory and magnetic superelasticity reported in these materials. We show that all these effects are a consequence of a strong coupling between structure and magnetism which enables a magnetic field to rearrange martensitic variants as well as to provide the possibility to induce the martensitic transition. These two features are respectively controlled by the magnetic anisotropy of the martensitic phase and by the difference in magnetic moments between the structural phases. The relevance of each of these contributions to the magnetocaloric properties is analysed.
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Affiliation(s)
- Antoni Planes
- Departament d'Estructura i Constituents de la Matèria, Facultat de Física, Universitat de Barcelona, Diagonal 647, E-08028 Barcelona, Catalonia, Spain
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