Anomalous positive magnetoresistance in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi>Fe</mml:mi><mml:mn>0.75</mml:mn></mml:msub><mml:msub><mml:mi>Mn</mml:mi><mml:mn>1.35</mml:mn></mml:msub><mml:mi>As</mml:mi></mml:mrow></mml:math>

Sun, Nan; Li, Y. B.; Li, Didi; Zhang, Q.; Feng, Wenjiang; Zhang, Z. D.

doi:10.1103/physrevb.74.172402

Cited by 14 publications

(31 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With increasing temperature, the magnetization drops abruptly at a temperature (defined as the phase transition temperature, T s ) of about 165 K, showing a magnetic phase transition from the FI to the AF state. A large thermal hysterisis of about 5 K between the transitions on warming and cooling processes is clearly observed [18]. An abrupt drop in magnetization and its thermal hysterisis at T s are characteristic of a first-order magnetic phase transition.…”

Section: Resultsmentioning

confidence: 85%

“…In our previous work, a positive magnetoresistance (MR) ratio as large as 12% for the first magnetic-field cycles was observed at 170 K at 5 T in the Fe 0.75 Mn 1.35 As compound [18]. The maximum positive MR ratios at 5 T, however, were only 1.6 and 0.6% for the second and third magneticfield cycles, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The temperature dependence of the magnetization from 5 K to 350 K for the Fe 0.75 Mn 1.35 As compound has been investigated in our previous work [18]. With increasing temperature, the magnetization drops abruptly at a temperature (defined as the phase transition temperature, T s ) of about 165 K, showing a magnetic phase transition from the FI to the AF state.…”

Section: Resultsmentioning

confidence: 99%

“…Polycrystalline Fe 0.75 Mn 1.35 As compound was synthesized by a method described elsewhere [18]. X-ray diffraction (XRD) was carried out to verify that the sample yielded diffraction peaks characteristic of a single phase with Cu 2 Sb-type tetragonal structure.…”

Section: Methodsmentioning

confidence: 99%

“…The change of the spin N. K. Sun (&) School of Science, Shenyang Ligong University, Shenyang 110168, People's Republic of China e-mail: naikunsun@gmail.com configuration from the AF to the FI state in the systems involves a spin reversal of the triple-layer magnetic sublattice. In our previous work [18], anomalous electrical transport and magneto-transport behaviors have been systematically explored for the Fe 0.75 Mn 1.35 As compound of this Fe a-x Mn x As family. Here we focus on the magnetic transitions and magnetocaloric effects in the Fe 0.75 Mn 1.35 As compound.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Magnetic transitions and magnetocaloric effects in Fe0.75Mn1.35As

Sun

Zhang

2009

J Mater Sci

Self Cite

View full text Add to dashboard Cite

In Fe 0.75 Mn 1.35 As compound, a metamagnetic transition from an antiferromagnetic phase to a ferrimagnetic phase can be induced above its phase transition temperature T s = 165 K by an external magnetic field, which leads to large magnetocaloric effects around T s . The sign of the magnetic entropy change DS M in the Fe 0.75 Mn 1.35 As compound is negative, not as expected as an inverse magnetocaloric effect, and the maximum value of DS M is 4.2 J/kg K at 167.5 K for a magnetic field change of 5 T. Although it induces an irreversible lattice expansion, the cycling of a magnetic field does not induce an irreversible change in the magnetic transitions and magnetocaloric behaviors. The antiferromagnetism-related metamagnetic transitions with a large magnetic entropy change may provide with an opportunity in searching novel materials for magnetic refrigeration.

show abstract

Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations