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Zhang, Yuqin; Zhang, Zhidong

doi:10.1103/physrevb.67.132405

Cited by 53 publications

(19 citation statements)

References 27 publications

(26 reference statements)

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“…A magnetoresistance of −13.5% was observed in the alloy for a field change of 5 T (see inset of figure 10). The resistivity curves as a function of temperature in the Ni 50 Mn 25+x Sb 25−x system are very similar to those observed in Mn 2 Sb 1−x Sn x and other metamagnetic systems, where an abrupt increase of electrical resistivity below the AF ordering temperature occurs due to a large decrease of the density of states (DOS) near the Fermi level [33][34][35][36]. Therefore it is possible that the martensitic transformation in the Ni 50 Mn 25+x Sb 25−x system is accompanied by an antiferromagnetic transition.…”

Section: Thermal Expansion and Resistivitysupporting

confidence: 72%

Magnetostructural phase transitions in Ni₅₀Mn_25+xSb_25−xHeusler alloys

Khan¹,

Dubenko²,

Stadler³

et al. 2008

J. Phys.: Condens. Matter

106

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The structural and magnetic properties of Ni(50)Mn(25+x)Sb(25-x) (0≤x≤18) Heusler alloys have been investigated by x-ray diffraction, magnetization, thermal expansion, and electrical resistivity measurements. Austenitic phases with the L2(1) cubic crystal cell and martensitic phases with Pmm2 orthorhombic structures have been observed at room temperature in alloys with 0≤x≤12.5 and 13≤x≤14, respectively. The Curie temperatures of the austenitic phases decrease linearly with increasing x and change from 370 (x = 0) to 340 K (x = 12.5). In the concentration 7

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Section: Thermal Expansion and Resistivitysupporting

confidence: 72%

Magnetostructural phase transitions in Ni₅₀Mn_25+xSb_25−xHeusler alloys

Khan¹,

Dubenko²,

Stadler³

et al. 2008

J. Phys.: Condens. Matter

106

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“…The GMR values in the Zn and Ni-doped samples rank among the largest ever observed in 3d GMR systems, such as FM shape memory alloys Ni 50 Mn 50−x In x (x = 14-16) (MR∼ 70% at 50 kOe) [42] and Mn 2 Sb 1−x Sn x (0 < x ≤ 0.4) (60% at 50 kOe). [43] Our result proves that the chemical substitution can be employed to effectively optimize the MR effect in GaCMn 3 . However, the underlying mechanisms are still not well understood.…”

Section: Giant Magnetoresistance (Gmr) In Mn-based Antiperovskite Car...supporting

confidence: 59%

Mn-based antiperovskite functional materials: Review of research

2013

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Our recent research on the Mn-based antiperovskite functional materials AXMn3 (A: metal or semiconducting elements; X: C or N) is outlined. Antiperovskite carbides (e.g., AlCMn3) show large magnetocaloric effect comparable to those of typical magnetic refrigerant materials. Enhanced giant magnetoresistance up to 70% at 50 kOe (1 Oe = 79.5775 Am−1) over a wide temperature span was obtained in Ga1−xZnxCMn3 and GaCMn3−xNix. In Cu0.3Sn0.5NMn3.2, negative thermal expansion (NTE) was achieved in a wide temperature region covering room temperature (α = −6.8 ppm/K, 150 K–400 K). Neutron pair distribution function analysis suggests the Cu/Sn-Mn bond fluctuation is the driving force for the NTE in Cu1−xSnxNMn3. In CuN1−xCxMn3 and CuNMn3−yCoy, the temperature coefficient of resistivity (TCR) decreases monotonically from positive to negative as Co or C content increases. TCR is extremely low when the composition approaches the critical points. For example, TCR is ∼ 1.29 ppm/K between 240 K and 320 K in CuN0.95C0.05Mn3, which is one twentieth of that in the typical low-TCR materials (∼ 25 ppm/K). By studying the critical scaling behavior and X deficiency effect, some clues of localized-electron magnetism have been found against the background of electronic itinerant magnetism.

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“…The structural as well as the magnetic phases can be tuned by external parameters such as magnetic field (H) or pressure (P) in addition to temperature (T). This, in association with the inherent disorder of the sample, can give rise to magnetic and electronic states which strongly depend upon the previous history of T, H or P [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Metastability and inverse magnetocaloric effect in doped manganite (Nd_0.25Sm_0.25Sr_0.5MnO₃) and ferromagnetic shape memory alloy (Ni₂Mn_1.36Sn_0.64): a comparison

Chatterjee¹,

Giri²,

Majumdar³

2012

J. Phys.: Condens. Matter

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The manganite Nd(0.25)Sm(0.25)Sr(0.5)MnO(3) (NSSMO) shows a first-order metal to insulator transition on cooling, which is concomitant with a magnetic transition from the ferromagnetic to antiferromagnetic state. In some respect the sample shows a striking similarity with Ni-Mn-Sn based ferromagnetic shape memory alloys (FSMAs) undergoing a first-order magneto-structural transition, and efforts have been made to highlight the similarities and dissimilarities of the studied manganite with one such FSMA of composition Ni(2)Mn(1.36)Sn(0.64). From our transport and magnetic investigations, the region of transition in the NSSMO is found to be highly metastable, with a clear indication of a magnetically arrested state which persists even when the sample is cooled down to the lowest temperature of measurement. Interestingly, the studied manganite shows an inverse magnetocaloric effect similar to the FSMA. However, a striking difference between the two compositions is evident in the low-temperature magneto-transport behavior: while a clear signature of tunneling magnetoresistance is present in NSSMO due to the coexisting metallic and insulating clusters of nanometer dimension, the studied FSMA do not show such behavior due to the absence of any insulating phase in the intermetallic alloy.

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Metamagnetic-transition-induced giant magnetoresistance inMn2Sb1−x

Cited by 53 publications

References 27 publications

Magnetostructural phase transitions in Ni₅₀Mn_25+xSb_25−xHeusler alloys

Magnetostructural phase transitions in Ni₅₀Mn_25+xSb_25−xHeusler alloys

Mn-based antiperovskite functional materials: Review of research

Metastability and inverse magnetocaloric effect in doped manganite (Nd_0.25Sm_0.25Sr_0.5MnO₃) and ferromagnetic shape memory alloy (Ni₂Mn_1.36Sn_0.64): a comparison

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Metamagnetic-transition-induced giant magnetoresistance inMn2Sb1−x

Cited by 53 publications

References 27 publications

Magnetostructural phase transitions in Ni50Mn25+xSb25−xHeusler alloys

Magnetostructural phase transitions in Ni50Mn25+xSb25−xHeusler alloys

Mn-based antiperovskite functional materials: Review of research

Metastability and inverse magnetocaloric effect in doped manganite (Nd0.25Sm0.25Sr0.5MnO3) and ferromagnetic shape memory alloy (Ni2Mn1.36Sn0.64): a comparison

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Product

Resources

About

Magnetostructural phase transitions in Ni₅₀Mn_25+xSb_25−xHeusler alloys

Magnetostructural phase transitions in Ni₅₀Mn_25+xSb_25−xHeusler alloys

Metastability and inverse magnetocaloric effect in doped manganite (Nd_0.25Sm_0.25Sr_0.5MnO₃) and ferromagnetic shape memory alloy (Ni₂Mn_1.36Sn_0.64): a comparison