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The crystal structures and magnetic properties of Ni50-xCoxMn39Sn11 (8≤x≤10) Heusler alloys are investigated. As a result, we achieve the magnetic field induced martensitic transformation in Ni42Co8Mn39Sn11. It is found that the saturation magnetic moments of alloys increase with Co content increasing. Moreover, a superspin glass behavior and a large exchange bias effect are also found in samples with Co content being higher than 8. We confirm the coexistence of superspin glass of the martensite and ferromagnetic parent phase, which is the physical origin of the exchange bias effect. On the other hand, we propose that the origin of superspin glass in our NiMnCoSn system is due to the occurence of Mn-Mn cluster as reported by Ma et al. in Heusler Mn2Ni1.6Sn0.4 alloys [Ma L, Wang W H, Liu J B, Li J Q, Zhen M, Hou D L and Wu G H 2011 Appl. Phys. Lett. 99 182507].
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Keywords:
- NiCoMnSn /
- Heusler alloys /
- superspin glass /
- exchange bias
[1] Ma L, Wang W H, Lu J B, Li J Q, Zhen C M, Hou D L, Wu G H 2011 Appl. Phys. Lett. 99 182507
[2] Heusler F 1903 Deut. Phys. Ges. 5 219
[3] Kasper J, Roberts B 1956 Phys. Rev. 101 537
[4] Liu Z H, Li G T, Wu Z G, Ma X Q, Liu Y, Wu G H 2012 J. Alloys. Compd. 535 120
[5] Webster P J, Ziebeck K R A, Town S L, Peak M S 1984 Phil. Mag. B 49 295
[6] Ullakko K, Huang J K, Kantner C, O'Handley R C, Kokorin V V 1996 Appl. Phys. Lett. 69 1966
[7] Wu G H, Yu C H, Meng L Q, Chen J L, Yang F M, Qi S R, Zhan W S, Wang Z, Zheng Y F, Zhao L C 1999 Appl. Phys. Lett. 75 2990
[8] Murray S J, Marioni M, Allen S M, O'Handley R C, Lograsso T A 2000 Appl. Phys. Lett. 77 886
[9] Kainuma R, Imano Y, Ito W, Souto Y, Morito H, Okmoto S, Kitakami O, Oikawa K, Fujita A, Kanomata T, Ishida K 2006 Nature 439 957
[10] Ma L, Zhu Z Y, Yu S D, Zhou Q, Chen J L, Wu G H 2009 Acta Phys. Sin. 58 3479 (in Chinese) [马丽, 朱志永, 于世丹, 周强, 陈京兰, 吴光恒 2009 58 3479]
[11] Zhang H L, Li Z, Qiao Y F, Cao S X, Zhang J C, Jing C 2009 Acta Phys. Sin. 58 7857 (in Chinese) [张浩磊, 李哲, 乔燕飞, 曹世勋, 张金仓, 敬超 2009 58 7857]
[12] Jing C, L Zhe, Chen J P, Lu Y M, Cao S X, Zhang J C 2007 Acta Phys. Sin. 57 3781 (in Chinese) [敬超, 李哲, 陈继萍, 鲁玉明, 曹世勋, 张金仓 2007 57 3781]
[13] Yu S Y, Ma L, Liu G D, Liu Z H, Chen J L, Cao Z X, Wu G H, Zhang B, Zhang X X 2007 Appl. Phys. Lett. 90 242501
[14] Cong D Y, Roth S, Schultz L 2012 Acta Mater. 60 5335
[15] Cong D Y, Roth S, Pöschke M, Hrrich C, Schultz L 2010 Appl. Phys. Lett. 97 021908
[16] Li P P, Wang J M, Jiang C B 2011 Chin. Phys. B 20 028104
[17] Ma Y, Yang S, Jin W, Liu X 2009 J. Alloys Compd. 471 570
[18] Tang X D, Wang W H, Zhu W, Liu E K, Wu G H, Meng F B, Liu H Y, Luo H Z 2010 Appl. Phys. Lett. 97 242513
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[1] Ma L, Wang W H, Lu J B, Li J Q, Zhen C M, Hou D L, Wu G H 2011 Appl. Phys. Lett. 99 182507
[2] Heusler F 1903 Deut. Phys. Ges. 5 219
[3] Kasper J, Roberts B 1956 Phys. Rev. 101 537
[4] Liu Z H, Li G T, Wu Z G, Ma X Q, Liu Y, Wu G H 2012 J. Alloys. Compd. 535 120
[5] Webster P J, Ziebeck K R A, Town S L, Peak M S 1984 Phil. Mag. B 49 295
[6] Ullakko K, Huang J K, Kantner C, O'Handley R C, Kokorin V V 1996 Appl. Phys. Lett. 69 1966
[7] Wu G H, Yu C H, Meng L Q, Chen J L, Yang F M, Qi S R, Zhan W S, Wang Z, Zheng Y F, Zhao L C 1999 Appl. Phys. Lett. 75 2990
[8] Murray S J, Marioni M, Allen S M, O'Handley R C, Lograsso T A 2000 Appl. Phys. Lett. 77 886
[9] Kainuma R, Imano Y, Ito W, Souto Y, Morito H, Okmoto S, Kitakami O, Oikawa K, Fujita A, Kanomata T, Ishida K 2006 Nature 439 957
[10] Ma L, Zhu Z Y, Yu S D, Zhou Q, Chen J L, Wu G H 2009 Acta Phys. Sin. 58 3479 (in Chinese) [马丽, 朱志永, 于世丹, 周强, 陈京兰, 吴光恒 2009 58 3479]
[11] Zhang H L, Li Z, Qiao Y F, Cao S X, Zhang J C, Jing C 2009 Acta Phys. Sin. 58 7857 (in Chinese) [张浩磊, 李哲, 乔燕飞, 曹世勋, 张金仓, 敬超 2009 58 7857]
[12] Jing C, L Zhe, Chen J P, Lu Y M, Cao S X, Zhang J C 2007 Acta Phys. Sin. 57 3781 (in Chinese) [敬超, 李哲, 陈继萍, 鲁玉明, 曹世勋, 张金仓 2007 57 3781]
[13] Yu S Y, Ma L, Liu G D, Liu Z H, Chen J L, Cao Z X, Wu G H, Zhang B, Zhang X X 2007 Appl. Phys. Lett. 90 242501
[14] Cong D Y, Roth S, Schultz L 2012 Acta Mater. 60 5335
[15] Cong D Y, Roth S, Pöschke M, Hrrich C, Schultz L 2010 Appl. Phys. Lett. 97 021908
[16] Li P P, Wang J M, Jiang C B 2011 Chin. Phys. B 20 028104
[17] Ma Y, Yang S, Jin W, Liu X 2009 J. Alloys Compd. 471 570
[18] Tang X D, Wang W H, Zhu W, Liu E K, Wu G H, Meng F B, Liu H Y, Luo H Z 2010 Appl. Phys. Lett. 97 242513
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