CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Prev
Next
|
|
|
Coexistence of positive and negative magnetic entropy changes in CeMn2(Si1-xGex)2 compounds |
Zuo Wen-Liang (左文亮), Hu Feng-Xia (胡凤霞), Sun Ji-Rong (孙继荣), Shen Bao-Gen (沈保根) |
State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China |
|
|
Abstract A series of CeMn2(Si1-xGex)2 (x=0.2, 0.4, 0.6, 0.8) compounds are prepared by the arc-melting method. All the samples primarily crystallize in the ThCr2Si2-type structure. The temperature dependences of zero-field-cooled (ZFC) and FC magnetization measurements show a transition from antiferromagnetic (AFM) state to ferromagnetic (FM) state at room temperature with the increase of the Ge concentration. For x=0.4, the sample exhibits two kinds of phase transitions with increasing temperature: from AFM to FM and from FM to paramagnetic (PM) at around TN ~ 197 K and TC ~ 300 K, respectively. The corresponding Arrott curves indicate that the AFM-FM transition is of first-order character and the FM-PM transition is of second-order character. Meanwhile, the coexistence of positive and negative magnetic entropy changes can be observed, which are corresponding to the AFM-FM and FM-PM transitions, respectively.
|
Received: 11 May 2015
Revised: 12 June 2015
Accepted manuscript online:
|
PACS:
|
71.20.Eh
|
(Rare earth metals and alloys)
|
|
75.30.Sg
|
(Magnetocaloric effect, magnetic cooling)
|
|
75.50.Ee
|
(Antiferromagnetics)
|
|
75.47.Np
|
(Metals and alloys)
|
|
Fund: Project supported by the Beijing Natural Science Foundation, China (Grant No. 2152034) and the National Natural Science Foundation of China (Grant Nos. 11274357 and 51271196). |
Corresponding Authors:
Zuo Wen-Liang, Shen Bao-Gen
E-mail: wlzuo@iphy.ac.cn;shenbg@aphy.iphy.ac.cn
|
Cite this article:
Zuo Wen-Liang (左文亮), Hu Feng-Xia (胡凤霞), Sun Ji-Rong (孙继荣), Shen Bao-Gen (沈保根) Coexistence of positive and negative magnetic entropy changes in CeMn2(Si1-xGex)2 compounds 2015 Chin. Phys. B 24 097104
|
[1] |
Gschneidner K A and Pecharsky V K 2000 Annu. Rev. Mater. Sci. 30 387
|
[2] |
Gutfleisch O, Willard M A, Bruck E, Chen C H, Sankar S G and Liu J P 2011 Adv. Mater. 23 821
|
[3] |
Shen B G, Sun J R, Hu F X, Zhang H W and Cheng Z H 2009 Adv. Mater. 21 4545
|
[4] |
Pecharsky V K and Gschneidner K A 1997 Phys. Rev. Lett. 78 4494
|
[5] |
Wang J L, Campbell S J, Cadogan J M, Studer A J, Zeng R and Dou S X 2011 Appl. Phys. Lett. 98 232509
|
[6] |
Tishin A M and Spichkin A I 2003 The Magnetocalric Effect and its Applications (London: Institute of Physics Publishing)
|
[7] |
Gschneidner K A, Pecharsky V K and Tsokol A O 2005 Rep. Prog. Phys. 68 1479
|
[8] |
de Oliveira N A and von Ranke P J 2010 Phys. Rep. 489 89
|
[9] |
Roy S B 2014 Handbook of Magnetic Materials 2014 (Amsterdam: Elsevier) 22
|
[10] |
Fujita A, Fujieda S, Hasegawa Y and Fukamichi K 2003 Phys. Rev. B 67 104416
|
[11] |
Hu F X, Shen B G, Sun J R, Cheng Z H, Rao G H and Zhang X X 2001 Appl. Phys. Lett. 78 3675
|
[12] |
Li L, Hutchison W D, Huo D, Namiki T, Qian Z and Nishimura K 2012 Scr. Mater. 67 237
|
[13] |
Kumar P, Singh N K, Suresh K G and Nigam A K 2007 J. Alloys Compd. 427 42
|
[14] |
Duman E, Acet M, Elerman Y, Elmali A and Wassermann E F 2002 J. Magn. Magn. Mater. 238 11
|
[15] |
Emre B, Dincer I and Elerman Y 2010 Solid State Commun. 150 1279
|
[16] |
Wang J L, Campbell S J, Zeng R, Poh C K, Dou S X and Kennedy S J 2009 J. Appl. Phys. 105 07A909
|
[17] |
FernandezBaca J A, Hill P, Chakoumakos B C and Ali N 1996 J. Appl. Phys. 79 5398
|
[18] |
Lalic M V, Mestnik-Filho J, Carbonari A W and Saxena R N 2004 J. Phys.: Condens. Matter 16 6685
|
[19] |
Liang G and Croft M 1989 Phys. Rev. B 40 361
|
[20] |
Duman E, Acet M, Dincer I, Elmali A and Elerman Y 2007 J. Magn. Magn. Mater. 309 40
|
[21] |
Elmali A, Dincer I, Elerman Y, Ehrenberg H and Fuess H 2003 J. Phys.: Condens. Matter 15 653
|
[22] |
Chau N, Cuong D H, Tho N D, Nhat H N, Luong N H and Cong B T 2004 J. Magn. Magn. Mater 272-276 1292
|
[23] |
Banerjee B K 1964 Phys. Lett. 12 16
|
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
Altmetric
|
blogs
Facebook pages
Wikipedia page
Google+ users
|
Online attention
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
View more on Altmetrics
|
|
|