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The specific heat of polycrystalline La0.7Ca0.3MnO3 at different resistance states induced by electric pulses was studied. It was found that the specific heat decreases with decreasing resistance, and the change is reversible. The reversible change of specific heat was shown to be mainly due to the ferromagnetic-spin-waves component and charge carriers component by fitting the specific heat data. These results indicate that the electric pulses modulated the magnetic configuration of LCMO at low temperature, which would result in large variation in magnetization and specific heat associated with ferromagnetic-spin-waves.
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Keywords:
- La0.7Ca0.3 MnO3 /
- oxygen motion /
- specific heat
[1] ［1］Liu S Q, Wu N J, Lgnatiev A 2000 Appl. Phys. Lett. 76 2749
[2] ［2］Ahn K H, Lookman T, Bishop A R 2004 Nature 428 401
[3] ［3］Nagaev E L 1996 Phys. Lett. A 218 367
[4] ［4］Li Q, Wang Z G, Liu S, Xing Z W, Liu M 2007 Acta Phys. Sin. 56 1637 (in Chinese) ［李倩、王之国、刘甦、刑仲文、刘楣 2007 56 1637］
[5] ［5］Tulina N A, Sirotkin V V 2004 Physica C 400 105
[6] ［6］Szot K, Speier W, Bihlmayer G, Waser R 2006 Nat. Mater. 5 312
[7] ［7］Baikalov A, Wang Y Q, Shen B, Lorenz B, Tsui S, Sun Y Y, Xue Y Y 2003 Appl. Phys. Lett. 83 957
[8] ［8］Nian Y B, Strozier J, Wu N J, Chen X, Ignatiev A 2007 Phys. Rev. Lett. 98 146403
[9] ［9］Ziese M, Bollero A, Panagiotopoulos I, Moutis N 2005 Phys. Rev. B 72 024453
[10] ］Long Y Z, Zheng P, Zhang Z M, Wei Z X, Wan M X, Chen Z J, Wang N L 2002 Acta Phys. Sin. 51 2090 (in Chinese) ［龙云泽、郑萍、张志明、魏志祥、万梅香、陈兆甲、王楠林 2002 51 2090］
[11] ］Ghivelder L, Abrego C I, Gusmao M A, Alonso J A, Cohen L F 1999 Phys. Rev.B 60 12184
[12] ］Luo J L, Zhang J, Chen Z J, Bai H Y, Wang Y P, Meng J B, Jin D, Ren Z A, 2001 Chin. Phys. Lett. 18 820
[13] ］Xu J, Luo J L, Chen Z J, Long Y Z, Bai H Y, Wan M X, Wang W L 2003 Acta Phys. Sin. 52 947 (in Chinese) ［许杰、雒建林、陈兆甲、龙云泽、白海洋、万梅香、王万录 2003 52 947］
[14] ］Woodfield B F, Wilson M L, Byers J M 1997 Phys. Rev. Lett. 78 3201
[15] ］Zhang J, Luo J L, Bai H Y,Chen Z J, Lin D H, Che G C, Ren Z A, Zhao Z X, Jin D 2002 Acta Phys. Sin. 51 6540 (in Chinese) ［张杰、雒建林、白海洋、陈兆甲、林德华、车广灿、任治安、赵忠贤、金铎 2002 51 6540］
[16] ］Li R W, Wang Z H, Chen X, Shen B G 1999 Acta Phys. Sin. 48 S105 (in Chinese) ［ 李润伟、王志宏、陈新、沈保根 1999 48 S105］
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[1] ［1］Liu S Q, Wu N J, Lgnatiev A 2000 Appl. Phys. Lett. 76 2749
[2] ［2］Ahn K H, Lookman T, Bishop A R 2004 Nature 428 401
[3] ［3］Nagaev E L 1996 Phys. Lett. A 218 367
[4] ［4］Li Q, Wang Z G, Liu S, Xing Z W, Liu M 2007 Acta Phys. Sin. 56 1637 (in Chinese) ［李倩、王之国、刘甦、刑仲文、刘楣 2007 56 1637］
[5] ［5］Tulina N A, Sirotkin V V 2004 Physica C 400 105
[6] ［6］Szot K, Speier W, Bihlmayer G, Waser R 2006 Nat. Mater. 5 312
[7] ［7］Baikalov A, Wang Y Q, Shen B, Lorenz B, Tsui S, Sun Y Y, Xue Y Y 2003 Appl. Phys. Lett. 83 957
[8] ［8］Nian Y B, Strozier J, Wu N J, Chen X, Ignatiev A 2007 Phys. Rev. Lett. 98 146403
[9] ［9］Ziese M, Bollero A, Panagiotopoulos I, Moutis N 2005 Phys. Rev. B 72 024453
[10] ］Long Y Z, Zheng P, Zhang Z M, Wei Z X, Wan M X, Chen Z J, Wang N L 2002 Acta Phys. Sin. 51 2090 (in Chinese) ［龙云泽、郑萍、张志明、魏志祥、万梅香、陈兆甲、王楠林 2002 51 2090］
[11] ］Ghivelder L, Abrego C I, Gusmao M A, Alonso J A, Cohen L F 1999 Phys. Rev.B 60 12184
[12] ］Luo J L, Zhang J, Chen Z J, Bai H Y, Wang Y P, Meng J B, Jin D, Ren Z A, 2001 Chin. Phys. Lett. 18 820
[13] ］Xu J, Luo J L, Chen Z J, Long Y Z, Bai H Y, Wan M X, Wang W L 2003 Acta Phys. Sin. 52 947 (in Chinese) ［许杰、雒建林、陈兆甲、龙云泽、白海洋、万梅香、王万录 2003 52 947］
[14] ］Woodfield B F, Wilson M L, Byers J M 1997 Phys. Rev. Lett. 78 3201
[15] ］Zhang J, Luo J L, Bai H Y,Chen Z J, Lin D H, Che G C, Ren Z A, Zhao Z X, Jin D 2002 Acta Phys. Sin. 51 6540 (in Chinese) ［张杰、雒建林、白海洋、陈兆甲、林德华、车广灿、任治安、赵忠贤、金铎 2002 51 6540］
[16] ］Li R W, Wang Z H, Chen X, Shen B G 1999 Acta Phys. Sin. 48 S105 (in Chinese) ［ 李润伟、王志宏、陈新、沈保根 1999 48 S105］
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