期刊
PHYSICAL REVIEW B
卷 91, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.91.020401
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资金
- U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) [DE-FG02-13ER46946]
- DOE, Office of Science, BES [DE-FG02-07ER46420, DE-FG02-06ER46291]
- NSF through DMR Grant [1306392]
- NSF [1360863]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1358975] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1306392, 1360863] Funding Source: National Science Foundation
A remarkable decrease of the structural transition temperature of MnNiSi from 1200 to < 300 K by chemically alloying it with MnFeGe results in a coupling of the magnetic and structural transitions, leading to a large magnetocaloric effect near room temperature. Application of relatively low hydrostatic pressures (similar to 2.4 kbar) lead to an extraordinary enhancement of the isothermal entropy change from -Delta S = 44 to 89 J/kgK at ambient and 2.4 kbar applied pressures, respectively, for a field change of Delta B = 5 T, and is associated with a large relative volume change of about 7% with P = 2.4 kbar.
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