Three first order magnetic phase transitions in re-entrant ferromagnet PrMn1.4Fe0.6Ge2

Zeng, Rong; Wang, Jianli; Lü, Lin; Li, Wenxian; Campbell, S. J.; Dou, Shi Xue

doi:10.1016/j.jallcom.2010.06.096

Cited by 7 publications

(10 citation statements)

References 23 publications

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“…The magnetization curves for NdMn 1.9 Ti 0.1 Si 2 for fields in the 0-5 T range around their ferromagnetic ordering temperatures show almost no magnetic hysteresis and very small hysteresis loss around 0.8 J kg -1 as defined from another reference [14], indicating the advantage of this material for real application. Furthermore, the Arrott plots are found to be S-shaped near T C ; this indicates a negative order of the sign of the coefficient c2(T) in the Landau expansion of the magnetic free energy [16], thereby denoting a first order magnetic transition.…”

Section: Resultsmentioning

confidence: 93%

Magnetic Properties and Magnetocaloric Effect in Layered NdMn1.9Ti0.1Si2

et al. 2014

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The structural and magnetic properties of the NdMn 1.9 Ti 0.1 Si 2 compund have been studied by high-intensity x-ray and high-resolution neutron powder diffraction, specific heat, dc magnetization, and differential scanning calorimetry measurements over the temperature range of 3-450 K. The Curie temperature and Néel temperature of layered NdMn 1.9 Ti 0.1 Si 2 are indicated as T C ~ 22 K and T N ~ 374 K respectively. The first order magnetic transition from antiferromagnetic [AFil-type] to ferromagnetic [F(Nd)+Fmc] around T C is found in layered NdMn 1.9 Ti 0.1 Si 2 and is associated with large magnetocaloric effect. This behavior has been confirmed as a contribution of the magnetostructural coupling by using neutron and x-ray powder diffraction. The magnetic entropy change -ΔS M ~ 15.3 J kg -1 K -1 and adiabatic temperature change ΔT ad ~ 4.7 K have been determined using magnetization and specific heat measurement under 0-5 T applied fields. This compound exhibits almost no thermal and magnetic hysteresis, thus potentially applicable in low temperature region for magnetic refrigerator material.

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Section: Resultsmentioning

confidence: 93%

Magnetic Properties and Magnetocaloric Effect in Layered NdMn1.9Ti0.1Si2

et al. 2014

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“…The Arrott plots are found to exhibit features characteristic of a first order transition for all of the samples. In particular the S-shaped nature of the Arrott plot near T C denotes a negative order of the sign of the coefficient c2(T) in the Landau expansion of the magnetic free energy [11], thereby denoting a first order magnetic transition.…”

Section: Magnetic Studiesmentioning

confidence: 99%

Magnetic Properties and Magnetocaloric Effect in Layered NdMn_1.9V_0.1Si₂

Din

Wang

Zeng

et al. 2014

EPJ Web of Conferences

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Abstract.The structural and magnetic properties of the compounds NdMn 2-x V x Si 2 have been studied by x-ray and high resolution neutron powder diffraction, specific heat, dc magnetization, and differential scanning calorimetry measurements over the temperature range 3-450 K. The Curie temperature and Néel temperature of layered NdMn 1.9 V 0.1 Si 2 are been indicate at T C ~ 24 K and T N ~ 376 K respectively. The giant magnetocaloric effect (GMCE) around T C is found in layered NdMn 1.9 V 0.1 Si 2 associated with first order magnetic transition from antiferromagnetic [AFil-type] to ferromagnetic [F(Nd)+Fmc]. This behaviorhas been confirmed as contribution of the magnetostructural coupling by using neutron powder diffraction. The magnetic entropy change -ΔS M ~ 25.4J kg -1 K -1 and adiabatic temperature change ΔT ad~ 6.7 K have been determined using magnetization and specific heat measurement under 0-8 T field applied. This compound belongs with the small thermal ~ 0.8 K and magnetic ~ 0.1 T hysteresis characteristic providing high potential material for magnetic refrigerator.

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“…The interesting phenomenon of re-entrant ferromagnetism has been found in several of these RT 2 X 2 compounds by controlling the interplay between the R-T and T-T exchange interactions through elemental substitution [11][12][13]. While there are several reports on MCE in RT 2 X 2 [14,15], few reports [16] exist in the literature on an MCE associated with re-entrant ferromagnetic transitions.…”

Section: Introductionmentioning

confidence: 99%

“…[13] We have investigated the magnetic phase transitions and determined magnetic phase diagrams in last paper [11], in this paper, interest is focussed on the magnetocaloric properties of the re-entrant ferromagnet PrMn 1.4 Fe 0.6 Ge 2 . It has been found that a first-order temperature-induced and field-induced order (AFmc) to order (Fmc + F(Pr)) magnetic phase transition around 25.5 K can induce giant MCE with low magnetic and thermal hysteresis.…”

Section: Introductionmentioning

confidence: 99%

Large magnetocaloric effect in re-entrant ferromagnet PrMn1.4Fe0.6Ge2

Zeng

Dou

Wang

et al. 2011

Journal of Alloys and Compounds

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Three first order magnetic phase transitions in re-entrant ferromagnet PrMn1.4Fe0.6Ge2

Cited by 7 publications

References 23 publications

Magnetic Properties and Magnetocaloric Effect in Layered NdMn<sub>1.9</sub>Ti<sub>0.1</sub>Si<sub>2</sub>

Magnetic Properties and Magnetocaloric Effect in Layered NdMn<sub>1.9</sub>Ti<sub>0.1</sub>Si<sub>2</sub>

Magnetic Properties and Magnetocaloric Effect in Layered NdMn_1.9V_0.1Si₂

Large magnetocaloric effect in re-entrant ferromagnet PrMn1.4Fe0.6Ge2

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Three first order magnetic phase transitions in re-entrant ferromagnet PrMn1.4Fe0.6Ge2

Cited by 7 publications

References 23 publications

Magnetic Properties and Magnetocaloric Effect in Layered NdMn<sub>1.9</sub>Ti<sub>0.1</sub>Si<sub>2</sub>

Magnetic Properties and Magnetocaloric Effect in Layered NdMn<sub>1.9</sub>Ti<sub>0.1</sub>Si<sub>2</sub>

Magnetic Properties and Magnetocaloric Effect in Layered NdMn1.9V0.1Si2

Large magnetocaloric effect in re-entrant ferromagnet PrMn1.4Fe0.6Ge2

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Magnetic Properties and Magnetocaloric Effect in Layered NdMn_1.9V_0.1Si₂