Structure, magnetic properties and magnetocaloric effects of Fe50Mn15−x Co x Ni35 alloys

Zhong, Xichun; Tian, H.C.; Tang, Peng-Fei; Liu, Zhongwu; Zheng, Zhigang; Zeng, Deliang

doi:10.1007/s11433-013-5383-z

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…Magnetic refrigeration based on the magnetocaloric effect (MCE) has attracted considerable attention as an alternative technology to the conventional gas compression-expansion refrigeration [1][2][3]. Application of magnetic field can generally reduce magnetic entropy of ferromagnetic (FM) materials, and thus the temperature of the materials decreases via adiabatic demagnetization [4].…”

Section: Introductionmentioning

confidence: 99%

Successive inverse and normal magnetocaloric effects in the Mn-vacancy compound Mn0.95Co0.75Cu0.25Ge

Liu

Zhang

Zhou

et al. 2020

Sci. China Phys. Mech. Astron.

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Ferromagnetic-structural transformation has been studied widely in MnCoGe-based materials. However, the magnetostructural transition (MST) from antiferromagnetic (AFM) orthorhombic phase to ferromagnetic (FM) hexagonal phase, which may lead to a large inverse magnetocaloric effect (MCE), has rarely been reported. Here, the introduction of Mn vacancy lowers the structural transition temperature while retains the AFM state in the orthorhombic phase, thus successfully realizing the AFM-FM MST in Mn 0.95 Co 0.75 Cu 0.25 Ge. Moreover, successive inverse and normal MCEs are observed around the first-order AFM-FM MST and the second-order FM-paramagnetic (PM) transition, respectively. A thermostat is proposed based on this special feature, which could release heat above the critical temperature while absorb heat below the critical temperature by simply applying the same magnetization/demagnetization cycles. This thermostat can be very useful in many applications where a constant temperature is required, such as cryostats and incubators. magnetocaloric, magnetically ordered materials, phase transitions

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