Evolution of magnetostructural transition and magnetocaloric effect with Al doping in MnCoGe1-xAlx compounds

被引：74

作者：

Bao, L. F. ^{[1
,2
]}

Hu, F. X. ^{[1
,2
]}

Wu, R. R. ^{[1
,2
]}

Wang, J. ^{[1
,2
]}

Chen, L. ^{[1
,2
]}

Sun, J. R. ^{[1
,2
]}

Shen, B. G. ^{[1
,2
]}

Li, L. ^{[3
]}

Zhang, B. ^{[3
]}

Zhang, X. X. ^{[3
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, State Key Lab Magnetism, Inst Phys, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, State Key Lab Magnetism, Inst Phys, Beijing 100190, Peoples R China

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2014年 / 47卷 / 05期

基金：

中国国家自然科学基金;

关键词：

magnetocaloric effect; magnetostructural transition; MnCoGe1-xAlx compounds; MARTENSITIC-TRANSFORMATION; METAMAGNETIC TRANSITION; MAGNETIC-PROPERTIES; TEMPERATURE;

D O I：

10.1088/0022-3727/47/5/055003

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of Al doping in MnCoGe1-xAlx compounds has been investigated. The substitution of Al for Ge enhances Mn-Mn covalent bonding by shortening the distance of nearest Mn atom layers, and thus stabilizes the hexagonal structure. As a result, first-order magnetostructural transition between ferromagnetic martensite and paramagnetic austenite takes place for the optimized compositions (x = 0.01, 0.02). Accompanied with the magnetostructural transition, large magnetocaloric effect (MCE) is observed. More doping of Al(x = 0.03, 0.04) leads to the separation of magnetic and structural transitions and remarkable reduction of MCE.

引用

页数：6

共 29 条

[1] The effect of magnetic irreversibility on estimating the magnetocaloric effect from magnetization measurements [J].

Amaral, J. S. ;

Amaral, V. S. .

APPLIED PHYSICS LETTERS, 2009, 94 (04)

[2] Pressure-tuned magnetocaloric effect in Mn0.93Cr0.07CoGe [J].

Caron, L. ;

Trung, N. T. ;

Bruck, E. .

PHYSICAL REVIEW B, 2011, 84 (02)

[3] Itinerant-electron metamagnetic transition and large magnetocaloric effects in La(FexSi1-x)13 compounds and their hydrides -: art. no. 104416 [J].

Fujita, A ;

Fujieda, S ;

Hasegawa, Y ;

Fukamichi, K .

PHYSICAL REVIEW B, 2003, 67 (10)

[4] Recent developments in magnetocaloric materials [J].

Gschneidner, KA ;

Pecharsky, VK ;

Tsokol, AO .

REPORTS ON PROGRESS IN PHYSICS, 2005, 68 (06) :1479-1539

[5] Consequences of the magnetocaloric effect on magnetometry measurements [J].

Hansen, B. R. ;

Bahl, C. R. H. ;

Kuhn, L. Theil ;

Smith, A. ;

Gschneidner, K. A., Jr. ;

Pecharsky, V. K. .

JOURNAL OF APPLIED PHYSICS, 2010, 108 (04)

[6] Particle size dependent hysteresis loss in La0.7Ce0.3Fe11.6Si1.4C0.2 first-order systems [J].

Hu, F. X. ;

Chen, L. ;

Wang, J. ;

Bao, L. F. ;

Sun, J. R. ;

Shen, B. G. .

APPLIED PHYSICS LETTERS, 2012, 100 (07)

[7] Influence of negative lattice expansion and metamagnetic transition on magnetic entropy change in the compound LaFe11.4Si1.6 [J].

Hu, FX ;

Shen, BG ;

Sun, JR ;

Cheng, ZH ;

Rao, GH ;

Zhang, XX .

APPLIED PHYSICS LETTERS, 2001, 78 (23) :3675-3677

[8] DIFFUSIONLESS ORTHORHOMBIC TO HEXAGONAL TRANSITIONS IN TERNARY SILICIDES AND GERMANIDES [J].

JOHNSON, V .

INORGANIC CHEMISTRY, 1975, 14 (05) :1117-1120

[9] Comparison of the zero-field-cooled magnetization behavior of some ferromagnetic and ferrimagnetic systems [J].

Joy, PA ;

Date, SK .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2000, 218 (2-3) :229-237

[10] Magnetic-field-induced shape recovery by reverse phase transformation [J].

Kainuma, R ;

Imano, Y ;

Ito, W ;

Sutou, Y ;

Morito, H ;

Okamoto, S ;

Kitakami, O ;

Oikawa, K ;

Fujita, A ;

Kanomata, T ;

Ishida, K .

NATURE, 2006, 439 (7079) :957-960

← 1 2 3 →